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Demi Lovato Knocks Out Sylvester Stallone While Boxing

Demi Lovato Knocks Out Sylvester Stallone in This Hilarious Boxing Video

Demi Lovato just knocked out Sylvester Stallone . . . and not just with her looks!

The badass babe is known for her incredible fitness routine, and she's partial to boxing. We're loving this video of Demi and the original Rocky Balboa facing off at the boxing gym! Better watch out, Sylvester!

Sylvester followed up with a cute caption saying he was boxing with his "long lost daughter, Roxana," at former fighter Jay Glazer's elite gym (you might recognize Jay from NFL or Fox Sports!). The gym? Unbreakable Performance Center — a favorite of Dwayne "The Rock" Johnson.

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