VIDEO: James Corden Subs In for Taylor Swift's Backup Dancer!

On the night of THE IHEARTRADIO JINGLE BALL concert at The Forum, James Corden stopped by and gave the building's general manager a break, and proceeded to check in on Ed Sheeran, Niall Horan, Demi Lovato, Sam Smith, Liam Payne and Taylor Swift, who realizes she made a mistake in replacing a backup dancer last second. Watch the video!

Each week night, James Corden invites the audience to join in on the fun as the Emmy Award-nominated THE LATE LATE SHOW WITH JAMES CORDEN features a mix of celebrity guests, musical acts, games and sketches. Corden differentiates his show by giving 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 Corden with original, improvised music throughout the show. Since Corden took the reigns as host in March 2015, the show has quickly become known for generating buzzworthy viral videos, such as Carpool Karaoke.