Watch James Corden Step In For Taylor Swift’s ‘Injured’ Backup Dancer

James Corden, the comedian, the talk show host, and Taylor Swift’s backup dancer?

The 39-year-old Late Late Show host lent his jack-of-all-trades skill set to The Forum in Los Angeles, as he became the concert venue’s General Manager for the day. And let’s just say, The Forum will never be the same after James was tasked with “preparing” stars for their iHeartRadio Jingle Ball Concert performances.

No celeb was safe as James wandered the venue’s halls, looking to assist any and all celebs.

First up on his “I can help with that” to-do list was Ed Sheeran’s security detail.

Despite the “Perfect” singer having his own bodyguard, James was on a mission to “protect” the star by any means necessary.

The “Gingerbread Man’s on lockdown,” James proclaimed, as Ed remained trapped in his dressing room.

James was then on the move to Niall Horan’s room. There, he asked the singer if he had gotten his “hemorrhoid cream” from his list of concert requests, and later gave Niall a head massage. The two parted ways after James gave the  “Slow Hands” singer a kiss on the forehead.

Demi Lovato lucked out as James simply gave her a pre-show pep talk (with a James Corden twist, of course).

“You’re Demi Lo-F**king-Vato,” he declared. “You’re going to get out there and you’re going to show those people exactly who you are, which is the best female vocalist in music today.”

Sam Smith was gifted a one-on-one therapy session that ended with James placing an apple in his mouth. “I feel like a pig,” Sam laughed as James instructed him to keep the fruit in his mouth until he hit the stage.

James’ last job was his toughest as he was forced to find a replacement for T-Swift’s “injured” backup dancer.

Without missing a beat, the funnyman was in his best “I’m a backup dancer” outfit -- which featured him in a fishnet body suit (that bared his entire belly), a snake crop top, and low-rise skinny jeans-- to step in for Taylor’s fallen dancer. If that wasn’t enough to secure his spot on the singer’s squad, he seamlessly jumped into Taylor’s “Look What You Made Me Do” choreography.

However, James’ moves just weren't good enough as the singer and her dancers ultimately hit the stage without him.

To see James’ full day as a GM, click the video above!

What do you think of James’ dancing skills? Sound off in the comments!