Taylor Swift debuts star-studded 'Bad Blood' video

Taylor Swift finally dropped the Sin City-style music video for her latest single, "Bad Blood," at Sunday night's Billboard Music Awards in Los Angeles.

The 25-year-old singer spent the last week teasing posters from the highly stylized clip, which features a number of her famous friends, including Karlie Kloss, Selena Gomez, Lena Dunham, Gigi Hadid, Cindy Crawford and Cara Delevingne, as futuristic assassins.

In the video, Gomez plays a leather-clad fighter named "Arsyn," who betrays Swift's character, "Catasrophe." The two only come to blows after Swift trains with other female fighters at an underground warehouse.

"Bad Blood" is widely believed to describe Swift's strained relationship with Katy Perry over the employment of a few backup dancers.

Ellen Pompeo and Mariska Hargitay, whose TV characters inspired the names of Swift's cats, also appear.