Taylor Swift capped off her busy week – hosting the Grammy nominations concert and holding hands with One Direction's Harry Styles- by performing at the Z100 Jingle Ball in NYC last night (Dec. 7.) She performed with collaborators Ed Sheeran and B.o.B.

Swift and redheaded British crooner Sheeran performed their 'Red' duet 'Everything Has Changed' for the first time (like) ever, and she also got her groove on to 'Both of Us,' her song with hip-hopper B.o.B.

She also delivered a rousing rendition of her own 'State of Grace.'

In her backstage chat with JJ from Z100, she said she still gets "major butterflies" when performing at Madison Square Garden. She also christened the Jingle Ball as "the event of the year."

The subject of her new BF Styles, whom she was seen hanging out with during any and all free time this week in NYC, didn't come up, save for JJ saying that she and one other band from the U.K. were the most popular on the bill and responsible for the show selling out.

Swift also sheepishly affirmed her love for rap music, saying, "I love hip-hop so much you guys" and did a bird call.

She also shared a photo of herself and B.o.B. embracing via Twitter.

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Watch Taylor Swift Perform 'Everything Has Changed'

Watch Taylor Swift Perform 'State of Grace'

Watch Taylor Swift + B.o.B. Perform 'Both of Us'

Watch Taylor Swift's Jingle Ball Interview