8. Alicia Keys
Alicia Keys is a great singer. But being a great selector takes a different set of skills. Her DJ name is AK-47, because her initials are A and K, and she likes to pop skulls in her spare time. It's nice of DJ Premiere to introduce her. It's also nice of him to help her catch the beat. Oh yeah, and those headphones are Beats By Dre, so you can see she knows the virtue of quality over celebrity.
7. Justin Bieber
Some of the best new DJs are barely old enough to smoke cigarettes. So maybe Bieber the boy-wonder can get his skills up in time for Ultra 2013. After watching this video, we think, uh, not so much. He looks like a two-year-old child playing DJ Hero. But at least he's got his enthusiasm cranked up to 11.