On Sunday night, Taylor Swift premiered the epic music video for her newest single, a previously unheard remix of 1989 track “Bad Blood” featuring Kendrick Lamar.

Including two guest verses, as well as an appearance from Kendrick Lamar, the video stars Lena Dunham, Hailee Steinfeld, Ellie Goulding, Paramore singer Hayley Williams, Zendaya, Jessica Alba, Karlie Kloss, Lily Aldridge, Cara Delevingne, Mariska Hargitay, Ellen Pompeo, Selena Gomez, Martha Hunt, Serayah, and Gigi Hadid.

 http://www.iheart.com/show/iHeartRadio-World-Premieres/?episode_id=27238395