Demi Lovato posted a video on Instagram of NFL insider Jay Glazer ringing the bell at his gym after a sparring session with her.  He was ringing the bell because the pop singer, who trains with him, had knocked his tooth out.

Lovato was proud of her accomplishment and bragged about knocking Glazer’s tooth out, while he was wearing his mouthpiece.

It turns out Demi is a knockout in more ways than one.  Put in your mouthpiece and keep your hands up while checking out some of her Instagram game below: 

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