Demi Lovato visited the "Tonight Show with Jay Leno." Demi is a Disney star who's starting to gain a head of steam when it comes to her popularity. The first thing Demi talked about was how young she is. She was born in 1992 and doesn't remember fellow guest's Tim Allen time on TV as the "ToolMan."

Demi talked about her first TV role when Jay showed a clip of her as a youngster on "Barney."

"I basically live life day by day," said Demi.

Demi is currently starring on Camp Rock. She's best friends with Selena Gomez. She and Selena are currently filming a new movie in Puerto Rico called "Princess Protection Program."

Demi is good friends with the Jonas Brothers and will be their opening act on their next tour. Not only does Demi sing, but she's also a songwriter. Right now, Demi is poised to be as successful as Miley Cyrus.

Here's the appearance by Demi Lovato on "Tonight Show with Jay Leno."

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