If there were a more unlikely success story in 2010 than alternative MC B.o.B, you would have to make them up. The genre-merging Atlanta rhymer, producer and multi-instrumentalist has a major pop hit on his hands with the sugary ode, “Nothin’ On You,” featuring Bruno Mars. For a mixtape favorite who's considered the logical successor to OutKast, having the No. 2 song in the country is a coup.
