GALLERY: 10 Things You May Not Know About Demi Lovato

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1. Demi once almost ran over Paul McCartney. - She shared the story on Twitter, writing, "I was pulling into a parking space that some guys were standing in the middle of, and almost hit them..... When one of the guys turned around.... it was a BEATLE........ Yes, YOU HEARD ME.... SIR PAUL McCARTNEY!!! He was so sweet!! Can't believe I met him today.. WOW! And.... I can't believe I almost ran over a Beatle....... :|"

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2. Talent runs in the family - Demi Lovato's mom was a country music recording artist. She was also a Dallas Cowboys cheerleader.

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3. Fame runs in the family - Demi's half-sister, Madison De La Garza, is also in the limelight. She starred in Desperate Housewives.

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4. She used to be a pageant girl - Demi Lovato was the 2000-2001 Mini Miss Texas.

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5. She may sing pop, but she loves heavy metal, music.

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6. Her first concert wasn't what you'd expect - Demi once revealed that her first concert was to see Carlos Santana.

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7. She has great taste - Her role model is Kelly Clarkson.

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8. Her first acting gig was with Selena Gomez - The two starred in Barney and Friends.

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9. She auditioned for Hannah Montana - although she lost the role to Miley Cyrus, it was ultimately how Disney discovered her.

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10. In 2011, Demi went to CAST Centers in California to get treatment for bulimia, depression, and substance abuse. She later bought the center and is now the co-owner