Music Minors: 21 Hottest Hip-Pop Stars Under 21 (LIST)

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Justin Bieber's only 18, but he's sold out concerts in mere seconds and has broken more YouTube records than any other artist.

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Hollywood is filled with so many beautiful and talented adults, but what about all the beautiful and talented young people? 

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There are so many amazing artists in music who can't legally make any decisions for themselves or have a quick drink at the bar, but they can sell out shows in seconds and sell millions of records. 

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From cookie-cutter pop stars to certified gangsta rappers, these hip-pop stars are the voice of the future and the face of music's next generation. 

GlobalGrind rounded up 21 of music's hottest hip-pop stars under 21. 

Check out the 21 hottest hip-pop stars in the gallery above!