21 Under 21: Mac Miller (2011)
21 Under 21: Mac Miller (2011)

No. 6. Mac Miller

Birthdate: Jan. 19, 1992 (age 19)

Why He's Hot: When Mac Miller's video for "Donald Trump" racked up over 22 million views on YouTube, the Donald himself was hyping the Pittsburgh emcee as "the next Eminem." While this remains to be seen, the future still looks bright for the Steel City's hottest rap product since Wiz Khalifa. The 2011 "XXL Freshmen" pick is set to release his debut LP "Blue Side Park" November 8 via Rostrum Records, with 90% of production done by Pittsburgh's ID LABS (E. Dan & Big Jerm).

NEXT: Jackie Evancho