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Taylor Swift's "Bad Blood" video boasts star-studded cast

The group of A-list pals Taylor Swift has enlisted for her latest music video just keeps growing.

Swift has been making all the announcements on Twitter -- the latest addition she revealed is model BFF Karlie Kloss -- and that list also includes Lena Dunham, Ellie Goulding, Hailee Steinfeld, Gigi Hadid, Zendaya and Lily Aldridge.

Based on the images the singer's been tweeting out, the video is going to have a "Sin City"/film noir sort of vibe. And, she noted, each individual actor/actress chose his or her character's name and persona -- Swift is "CATastrophe," because of course she is.

"Bad Blood" -- directed by Joseph Kahn, who also helmed Swift's "Blank Space" video -- will premiere this during the Billboard Music Awards, airing Sunday night on ABC.