Demi Lovato is strong!

The 26-year-old “Sorry Not Sorry” singer posted 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, when’s my first fight?! 😝 #unbreakableperformance,” Demi captioned the post.

“Demi knocked my tooth out!” he reveals in the video, showing off his tooth.

Watch it below!