While hanging out backstage, Rich Brian and James improvised unique rapper ad-libs, like "The Randy Macho Man Savage" and "The Ramen Eater," over the new songs "Occupied" and "Enemies." More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

While backstage at The Late Late Show, Chris O'Dowd gives his take on interesting fan theories about 'The IT Crowd' from Reddit. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

While backstage at 'The Late Late Show,' Glenn Howerton gives his take on funny 'It's Always Sunny in Philadelphia' fan theories from Reddit. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

On Reddit, r/The_Dennis celebrates Dennis Reynolds from 'It's Always Sunny in Philadelphia' like r/The_Donald treats Donald Trump. Glenn Howerton, who plays Dennis, has never seen the Subreddit until today. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

Henry Winkler plays the only game in Hollywood where an actor tries to remember all of his characters' names from all of his movies and TV shows, from 'Mary Tyler Moore' and 'Happy Days' to 'Childrens Hospital' and 'Barry.' More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

While backstage at 'The Late Late Show,' David Duchovny gives his take on fan theories about 'The X-Files' from Reddit. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

Rock band The Voidz stop by the Stage 56 Heineken bar to share what they would do if found in very specific scenarios. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

Comedian Tig Notaro answers a few funny and a few odd questions from Reddit's Too Afraid To Ask message board. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

British aristocrat Sir Archibald Cripes [who bares a striking resemblance to writer Louis Waymouth] does not understand American things, so he barges into Ben Schwartz's dressing room to demand answers. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

Nick Offerman is not shy about his former life as a breakdancer and proves he can still pop and lock now. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

Mark Duplass, executive producer of the Rajneeshpuram documentary series 'Wild Wild Country,' tests his knowledge about new religious movements and cults with a six-question quiz. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."

Rob Riggle reacts to clever names for fantasy football teams that our fans submitted via Twitter. More Late Late Show: Subscribe: http://bit.ly/CordenYouTube Watch Full Episodes: http://bit.ly/1ENyPw4 Facebook: http://on.fb.me/19PIHLC Twitter: http://bit.ly/1Iv0q6k Instagram: http://bit.ly/latelategram Watch The Late Late Show with James Corden weeknights at 12:35 AM ET/11:35 PM CT. Only on CBS. Get new episodes of shows you love across devices the next day, stream live TV, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- Each week night, THE LATE LATE SHOW with JAMES CORDEN throws the ultimate late night after party with a mix of celebrity guests, edgy musical acts, games and sketches. Corden differentiates his show by offering viewers a peek behind-the-scenes into the green room, bringing all of his guests out at once and lending his musical and acting talents to various sketches. Additionally, bandleader Reggie Watts and the house band provide original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, he has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke."