Rihanna unveils Chris Brown duet "Nobodies Business"

Rihanna performs during the 2012 iHeart Radio Music Festival in Las VegasLOS ANGELES (Reuters) – R&B star Rihanna unveiled a duet entitled "Nobodies Business" with ex-boyfriend Chris Brown on Tuesday, three years after Brown was charged with assaulting her. The song was part of an official track list that Barbadian singer Rihanna tweeted to her followers for her upcoming album "Unapologetic," and comes after weeks of speculation in the media that the couple have rekindled their romance being spotted together at numerous events. …