M.I.A.'s fourth album, Matangi, is out now. Daniel Sannwald/Courtesy of the artist hide caption

itoggle caption Daniel Sannwald/Courtesy of the artist

Clockwise from upper left: Anna Calvi, M.I.A., Poliça, members of Los Campesinos!, Deltron 3030 and Phil Elverum of Mount Eerie Courtesy of the artists hide caption

itoggle caption Courtesy of the artists

Madonna (center), flanked by Nicki Minaj and M.I.A., during a performance of her new single "Give Me All Your Luvin'" during the Bridgestone Super Bowl XLVI Halftime Show in Indianapolis. Christopher Polk/Getty Images hide caption

itoggle caption Christopher Polk/Getty Images

M.I.A. Jaime Martinez hide caption

itoggle caption Jaime Martinez

Lady Gaga in her controversial video for "Telephone." courtesy of artist hide caption

itoggle caption courtesy of artist