Taylor Swift [1] brought the heat to Sunday night's Billboard Music Awards in Las Vegas, and she had her army of friends to help her along. While Taylor was strutting her stuff in a gorgeous white jumpsuit (with a "Bad Blood" clutch to boot), she was joined by Zendaya [2], Hailee Steinfeld, Lily Aldridge, and Martha Hunt. Her red carpet friend-fest is absolutely appropriate, given the fact that she kicked off the night with the premiere of her "Bad Blood" music video [3]. Taylor's been teasing the video for weeks, giving us glimpses at the staggering roster of stars, many of whom come from her extensive list of Hollywood friendships, flames, and feuds [4]. The night wasn't all about friends for Taylor, though, since she was joined by her new beau, Calvin Harris [5], inside. Keep reading for more pics from Taylor's red carpet domination.