You could have mistaken Taylor Swift last night for one of the models as she performed as they walked down the catwalk.

She joined Fall Out Boy on “My Songs Know What You Did in the Dark (Light Em Up)” and than took the stage alone to do "I Knew You Were Trouble".

Charles Kelly from Lady Antebellum and Adam Levine from Maroon 5 sat next to each other as they watched Swift's performance.The show will air Tuesday, Dec. 10 on CBS.