21 Under 21: Cody Simpson (2011)

21 Under 21: Cody Simpson (2011)

No. 13. Cody Simpson

Birthdate: Jan. 11, 1997 (Age 14)

Rank Last Year: 20

Why He's Hot: Australian teen star Cody Simpson is slowly becoming the all-encompassing pop phenom that could make him a household name by this time next year. After working with Flo Rida on his debut EP, "4 U," last year, the singer-songwriter unveiled a "very emotional" six-song EP, "Coast to Coast," in September; its first single, "On My Mind," has already earned 7 million views on YouTube. With a full-length debut expected for early 2012, Simpson may move into the highest tier of our 21 Under 21 list in 2012.

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