Taylor Swift(01 of18)
Open Image ModalPretty famous pop singer. Kind of a big deal. Perhaps you've already heard of her. (credit:Vevo)
Selena Gomez(02 of18)
Open Image ModalSinger of the criminally-underrated 'Love You Like A Love Song', 'Come & Get It' and 'Slow Down'. Used to go out with Justin Bieber, now going out with Zedd. Does anyone else reckon that wig is looking a bit Katy Perry-esque? Just a co-incidence, we're sure... (credit:Vevo)
Joseph Kahn(03 of18)
Open Image ModalOf course, he's not actually in the video, but it's worth noting that Joseph Kahn has some pretty impressive music videos under his belt already, including Eminem's 'Love The Way You Lie', Britney Spears' 'Toxic', Gwen Stefani's 'The Sweet Escape' and... erm... Samantha Mumba's 'Baby, Come On Over'. (credit:Vevo)
Kendrick Lamar(04 of18)
Open Image ModalOne of the biggest rappers in the world right now, Kendrick contributes a guest verse to the 'Bad Blood' remix. He hit the top of the UK album chart earlier this year with his latest release, 'To Pimp A Butterfly'. (credit:Vevo)
Lena Dunham(05 of18)
Open Image ModalThe brilliant, Golden Globe-winning creator of the sitcom 'Girls', which she also writes, directs and stars in. (credit:Vevo)
Hailee Steinfeld(06 of18)
Open Image ModalHailee previously starred as the female lead in the 2013 film adaptation of 'Romeo and Juliet'. We're sure her Shakespeare background really helped her prep for her role as The Trinity, which largely involves staring at the camera and wearing a helmet. (credit:Vevo)
Serayah(07 of18)
Open Image ModalWhen she's not putting a dent in a metal wall with her bare fist, Serayah is known for her role as Tiana in the critically-acclaimed musical sitcom, 'Empire'. (credit:Vevo)
Gigi Hadid(08 of18)
Open Image ModalGigi Hadid is best known for her modelling shoots in the likes of Vogue, Elle and Cleo magazines. Bizarrely, she's also put in several appearances on 'The Real Housewives Of Beverly Hills'. (credit:Vevo)
Ellie Goulding(09 of18)
Open Image ModalEllie's one of the stars we're guessing you have heard of, thanks to her UK hits 'Burn', 'Anything Could Happen' and her most recent chart-topper, 'Love Me Like You Do'. She also loves a good run. (credit:Vevo)
Martha Hunt(10 of18)
Open Image ModalBest known for her modelling work as a Victoria's Secret Angel, Martha plays Homeslice in the 'Bad Blood' video, taking on Taylor Swift for a sword-fight. (credit:Vevo)
Cara Delevingne(11 of18)
Open Image ModalIf you have eyes and have left the house in the past 18 months, the chances are you've seen Cara Delevingne somewhere on an advert for something. You name a brand and she's done a campaign for them - Burberry, Topshop, D&G, DKNY... the list is truly endless.She's also a tabloid staple thanks to her high-profile relationships with the likes of Michelle Rodriguez, Harry Styles and the singer/songwriter, St Vincent. (credit:Vevo)
Zendaya(12 of18)
Open Image ModalZendaya is most popular with teenage audiences, who know he from starring in the Disney Channel shows 'K.C. Undercover' and 'Shake It Up', later appearing as the youngest ever contestant on 'Dancing With The Stars'.Away from the screen, she was recently involved in a high-profile media frenzy, when Giuliana Rancic was accused of racism over comments she made about Zendaya's appearance at the Oscars. (credit:Vevo)
Hayley Williams(13 of18)
Open Image ModalPractically as famous for her bright hair as she is her music career, Hayley is the frontwoman of Paramore, responsible for hit singles like 'Still Into You' and 'Ignorance'.She's also enjoyed success as a solo star, featuring on B.O.B.'s 'Airplanes', as well as Zedd's 'Stay The Night'. (credit:Vevo)
Lily Aldridge(14 of18)
Open Image ModalAnother of Taylor's Victoria's Secret friends, Lily has also appeared as a swimsuit model in Sports Illustrated. (credit:Vevo)
Karlie Kloss(15 of18)
Open Image ModalRecently stepping down from her work as a Victoria's Secret Angel, Karlie recently covered Vogue in a joint feature with Taylor. (credit:Vevo)
Jessica Alba(16 of18)
Open Image ModalStar of the 'Sin City' series the video was inspired by, Jessica has also appeared in 'Fantastic Four', 'Machete' and, of course, the cinematic opus that was 'Spy Kids 4: A Dame To Kill For'. (credit:Vevo)
Mariska Hargitay and Ellen Pompeo(17 of18)
Open Image ModalYou probably know Mariska from her 17 seasons as Olivia Benson on 'Law And Order: SVU', recently playing the character in a crossover with 'Chicago Fire'.Ellen's most famous role is in 'Grey's Anatomy', where she plays the leading role of Meredith Grey. (credit:Vevo)
Cindy Crawford(18 of18)
Open Image ModalLast but definitely not least, Cindy is one of the most iconic supermodels of all time, appearing in countless advertising campaigns and magazine covers across her decades-spanning career. (credit:Vevo)