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Demi Lovato is a singer and actress who stars on Disney Channel's original series Sonny with a Chance.
Demi Lovato - Mini Biography (2:36)
Miley Cyrus - Mini Biography (2:36)
Demi Lovato started out on "Barney & Friends" and eventually landed her own Disney Channel series "Sonny with a Chance." In 2012 she joined "The X Factor" as a judge and released the hit single "Heart Attack" in 2013.
Miley Cyrus, daughter of country star Billy Ray Cyrus, got her start as a child actor and singer in the Disney series "Hannah Montana." She has since shed her innocent image and grown into a pop star in the public eye.
Punk pop singer Avril Lavigne entered the music scene with a rebellious streak, capturing audiences with songs like "Complicated" and "Sk8er Boi." She later opted to go a more tame route when releasing her music.
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Examine the judges of the popular singing competition show The X Factor, which has drawn comparisons to American Idol. Judges have included Britney Spears, Simon Cowell, Paulina Rubio, L.A. Reid, Nicole Scherzinger, Paula Abdul, Cheryl Cole and more. Pick your favorite celebrity judge of The X Factor on Biography.com.
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