Demi Lovato Knocks Out Sylvester Stallone in This Hilarious Boxing Video

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

Just knocking out Rocky (@officialslystallone) easy day at @unbreakableperformance.. #nobigdeal #boxingLEGEND #thenewcreed #ROXYBALBOA #Rockysdaughter #unthinkableatunbreakable

A video posted by Demi Lovato (@ddlovato) on Nov 2, 2016 at 12:16pm PDT

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!

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20 Reasons Demi Lovato Is Our #FitCrush

Rocky gets knocked out by his long-lost daughter, Roxana … Starring Demi Lovato @ddlovato. The Unthinkable At Unbreakable @unbreakableperformance #boxing #rocky #gym #upsetofthecentury #rocky8

A video posted by Sly Stallone (@officialslystallone) on Nov 2, 2016 at 12:31pm PDT

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.