A lot has happened to JoJo since she recorded her first album three years ago. She became the second-youngest solo artist to have a No. 1 single in the U.S. with "Leave (Get Out)"; her debut album, "JoJo," went platinum; and she somehow made time to star in the movies "RV" with Robin Williams and "Aquamarine" with Emma Roberts. That's a lot of accomplishments for a 15-year-old. Her outlook on life is different now than it was when she recorded her first album at age 12. "I still have a lot more to figure out, of course," says JoJo. "But from 12 to now is a big difference. You hear that in the record a lot." Read more about JoJo and check out some free JoJo downloads.