Stars Light up Las Vegas at the 2015 Billboard Music Awards

There were a lot of celebs strutting their stuff at the MGM Grand Garden Arena last night in Las Vegas for the 2015 Billboard Music Awards, but it was definitely Taylor Swift’s night. Between premiering her BFF-packed “Bad Blood” music video, putting on a public display of affection with boyfriend Calvin Harris and picking up several top honors, the singer owned the awards. Balmain was the other big winner as designer Olivier Rousteing put his impending H&M collab on display with a little help from Jourdan Dunn and Kendall Jenner, while numerous attendees like co-host Chrissy Teigen and Taylor rocked Balmain outfits on the red carpet. Britney Spears and Iggy Azalea also performed “Pretty Girls” for the first time on TV, plus there was even a tribute to mark the 30th anniversary of The Breakfast Club with Molly Ringwald (the newest member of Taylor’s Brat Pack?) introducing Simple Minds to belt out the classic “Don’t You (Forget About Me).”

Check out the best of the Las Vegas looks by clicking on the slideshow above.