Demi Lovato

Trust us, she's only 20 years old, and she has already made it to the top of the American Pop charts churning one chartbuster after another, and where did all this start? Television, as always. She did small cameos in shows like Prison Break, etc. but her fling with Disney happened in 2007 with As the Bell Rings, and since then she was seen as a regular in Sonny with Chance and their television flick Camp Rock. After that, she did some more work with Disney till she exploded in the music scene and made a name for herself! From what we see, she's got a lot of time to up her game!