Demi Lovato Accidentally Knocks Her Trainer's Tooth Out - Watch!

Do not mess with Demi Lovato.
The 26-year-old “Tell Me You Love Me” superstar uploaded a video on Tuesday (March 5) on her Instagram, revealing that she accidentally knocked out her trainer’s tooth!
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“Holy s–t I literally knocked @jayglazer’s tooth out during training this morning – while he was wearing a mouth piece!!!! Hahahahaha sorry (not sorry) Jay!!! 😂😝👊🏼 So coach, whe