Watch Demi Lovato 'knock out' Sly Stallone at the boxing gym

What if Rocky Balboa had a long-lost daughter, and that character was played by Demi Lovato? You'd have the scene that played out at Unbreakable Performance boxing gym in Los Angeles today.

Sylvester Stallone shared an Instagram video of himself, "Rocky," and Lovato, his so-called "daughter, Roxana."

He hashtaged the video "Rocky 8" and "upset of the century," because the video ends with Lovato hitting Stallone in the face, and Stallone hitting the ground. "I slipped, I slipped!" he yells.

Lovato shared the video, too, with the caption "Just knocking out Rocky..."

She used the hashtag "the new Creed," but she should be grateful she didn't get hit the same way Creed star Michael B. Jordan did in the Rocky spin-off:.