Adam Lambert to mentor “American Idol” finalists

NEW YORK (Billboard) – “American Idol” runner-up Adam Lambert will mentor the show’s current crop of contestants next Tuesday, and will perform his single “Whataya Want from Me” on the following night’s results show. “It’s true!” the glam-pop singer wrote on his Twitter page Tuesday. “In addition to performing on Idol April 14th, I will be mentoring the …