Demi Lovato reveals sister: Singer never knew she had a secret half-sibling

quot;X Factor" judge Demi Lovato just found out she had an older half-sister.

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Demi Lovato Reveals She Has a Secret Sister!

Demi Lovato reveals secret half-sister

Demi Lovato reveals she has a half-sister she never knew

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Demi Lovato reveals secret half-sister