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

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

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

itoggle caption courtesy of artist