Pharrell Williams isn't a fan of reality TV. So it's more than a little surprising that the music guru is set to star as a mentor on one very soon. "I like to refer to myself as a helper, because mentor just sounds weird." the producer told E! New's Alicia Quarles. "It feels so reality show, and that's not my thing." So, who talked the singer into give a reality show a chance? Rihanna. "She asked me to be a part of it. I love what she's doing I love what she represents," gushed the Billionaire Boys Club designer. Adding: "There's a relentlessness there and that, to me, is awesome!" But the "Diamonds" singer aside, Pharrell had...