Mariah Carey delivers some new music for the first time since delivering her twins. The diva duets with Tony Bennett on a remake of his jazzy piano number “When Do the Bells Ring for Me,” one of the many collaborations on his 85th birthday album Duets II (Sept. 20). MC has also signed on as a “guest of a judge” on the U.S. edition of Simon Cowell’s “X Factor,” premiering September 21.
