Outkast to headline Bestival 2014 but play second fiddle to Bruno Mars at Wireless Festival The rap duo make their comeback this summer having not performed together since 2004, with 2014 marking the 20th anniversary of their debut album Southernplaylistcadillacmuzik. Fans will no doubt flock to see Andre 3000 and Big Boi when they hit Bestival on the Isle of Wight, where the fancy dress code this year will be a tropical 'Desert Island Disco' theme. The pair were snubbed from a headline slot at Wireless however in favour of Mars, while Kanye West and Drake will headline on the other nights. Bruno Mars will close Wireless Festival (Picture: Getty) Outkast have confirmed they will play more than 40 festivals this year, which includes a slot at one of the world's biggest - Coachella Festival in California - where they will headline alongside Arcade Fire and Muse.