JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
Taylor Swift rocked the stage at the Victoria’s Secret Fashion Show, performing “I Knew You Were Trouble” and dancing with the models as they strutted down the runway.
A video taken at the event shows part of Swift and Fall Out Boy’s performances, as well as Adam Levine proudly cheering on fiancée Behati Prinsloo.
The fashion show airs on CBS on December 10.
Check out the video below!