This Barbadian babe has four AMA nods in her direction for 2012. At 16, Rihanna traveled to the U.S. to pursue a recording career and quickly signed a contract with Def Jam Recordings after a successful audition with Jay-Z. Since then, RiRi has gone on to sell more than 25 million albums and continues to heat up the Billboard with hit after hit. From “Pon De Replay” to her most recent “Diamonds,” Rihanna is well on her way to becoming a pop icon.