"On the night of the iHeartRadio Jingle Ball concert at The Forum, James stops by and gives the building's general manager a break, and proceeds 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.
You can watch the iHeartRadio Jingle Ball on the CW Network at 8p on Thursday, December 14."