London - International record label trade group IFPI, and "American Idol" and "X Factor" producer Simon Cowell's record label SyCo have enlisted the police to help catch a hacker who leaked an unreleased track from artists Leona Lewis and Justin Timberlake, according to published reports. "IFPI is working with SyCo and law enforcement agencies in the U.S. and Europe to trace the individuals who stole the Leona Lewis/Justin Timberlake track," Jeremy Banks, head of IFPI's Internet anti-piracy unit, told Reuters.