Video: Demi Lovato Pulls Her Own Hair Out!

Demi Lovato had a hairpiece malfunction!

The singer hit the stage last week as part of her North American tour -- where, at one point, one of her hair extensions got caught on her cuff and ripped right off her head!

It didn't seem to affect Demi's performance though, as she just kept on dancing with a piece of hair handing from her wrist.

The action starts around the :40 mark.

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