12. Chief Keef: 21 Under 21 (2013)
Last Year's Rank: N/A
Birthdate: August 15, 1995 (Age 18)
Why He's Hot: Chief Keef is polarizing for his young age. The rapper has faced adversaries and altercations, yet still continues to hustle. After Kanye West remixed his single, "I Don't Like," Chief Keef went on to sign a record deal with Interscope Records and get his own record label, Glory Boyz Entertainment. The Chicago-bred rapper has since released his mixtape, "Bang Pt. 2," and has been recruited as the newest member of Gucci Mane's 1017 Brick Squad Records.