Watch Demi Lovato 'knock out' Sylvester Stallone in boxing session

He might have played the most famous boxer in movie history, but Rocky star Sylvester Stallone found his latest opponent too tough to handle.

Singer Demi Lovato showed she has a mean right hook as she knocked down the veteran Hollywood star during a sparring session at an LA gym.

Demi Lovato (Richard Shotwell/AP)
Demi Lovato (Richard Shotwell/AP)

"Just knocking out Rocky (@officialslystallone) easy day at @unbreakableperformance," the 24-year-old posted on Instagram.

In the video, Sylvester, 70, can be heard joking, "I slipped! I swear, it was an accident!"

Moments later, the duo showed there were no hard feelings by embracing in a hug.

Sylvester shared the same clip to his own Instagram, writing: "Rocky gets knocked out by his long-lost daughter, Roxana ... Starring Demi Lovato @ddlovato. The Unthinkable At Unbreakable."

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