Watch Taylor Swift kick ass in new music video Bad Blood

Taylor Swift plays a character called 'Catastrophe' in her new music video, Bad Blood. Photo/Instagram

Taylor Swift has unveiled her star-studded and action-packed new music video at the Billboard Music Awards.

The pop star, who leads the awards with 14 nominations, screened the stylised video for Bad Blood at the beginning of the ceremony in Las Vegas.

The all-action video stars Lena Dunham, Mariska Hargitay, Ellen Pompeo and Jessica Alba, as well as musicians like Kendrick Lamar, Ellie Goulding and Hayley Williams of Paramore, among others.

Swift has been building up the video's release for weeks, releasing a series of Sin City-style posters on Instagram featuring everyone who stars in the video.

In the video, Ellie Goulding wields a rocket launcher, Zendaya shows off her knife-throwing skills and in a fiery climax, Swift walks away from a giant explosion with the entire cast of the video.

"Band aids don't fix bullet holes, you say sorry just for show," sings Swift in the song that seems aimed at another spurned lover.

Swift's Billboard nominations include top artist, top Billboard 200 album for 1989 and top Hot 100 for Shake It Off.

Taylor Swift arrives at the Billboard Music Awards in Las Vegas. Photo/AP

- nzherald.co.nz