Age: 23
Label: Grand Hustle/Rebel Rock/Atlantic
From: Atlanta, Georgia
Active Since: 2006
Twitter: @bobatl
Best Known Song: "Nothin on You" f/ Bruno Mars (2010)

B.o.B has had more commercial success than most other MCs on this list. And while this may have soured some rap purist's perception of him, just because he's your little niece's favorite rapper doesn't mean he isn't sick on the mic. While making multiple appearances on the Top 40 chart, B.o.B has also kept rap fans laced with mixtapes like B.o.B vs. Bobby Ray and EPIC, which are both stacked with serious hip-hop tracks.

While his debut album, B.o.B Presents: The Adventures of Bobby Ray, may lean more toward pop than hip-hop, there is no denying the fact that B.o.B has serious skills and, at age 23, he's got the commercial clout to do whatever he pleases.