She's brave! Demi Lovato, 24, takes a swing at Rocky legend Sylvester Stallone, 70, during boxing session... but HE is the one who goes down

As a means to keep in shape, she has become an avid boxer.  

But Demi Lovato's skills in the ring were put to the test on Friday, when the Heart Attack singer faced off against the ultimate Hollywood boxing champ, Sylvester Stallone. 

On Wednesday, the brunette took to Instagram to give her followers a look into her intense session.

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Attack! On Wednesday, Demi Lovato's skills in the ring were put to the test on Friday, when the singer, 24, faced off against the ultimate Hollywood boxing champ, Sylvester Stallone, 70

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

The clip opened with Sylvester and Demi staring each other down as they prepped to fight. 

The songstress, 24, took a whack at the Creed star, but missed. She attempted twice more, and hit only his glove.

Then, it was Sylvester's turn.  

First tries: The songstress took a whack at the Creed star, but missed. She attempted twice more, and hit only his glove

Almost! Sylvester, dressed in head-to-toe black, gave it his all as his swung at the pop star, but she ducked just in time

Success! As soon as she leaned away, the recently single star popped right up and hit him in the chin

The father-of-five, dressed in head-to-toe black, gave it his all as his swung at the pop star. 

But Demi wasn't going to let him give the first hit; she instinctively ducked. 

As soon as she leaned away, the recently single star popped right up and hit him in the chin, knocking him to the ground.

'I slipped! I slipped!' he began to explain, as the two hugged it out. 

'I slipped! I swear, it was an accident,' he joked. 

Petite and powerful! She knocked him completely to the ground

Still friends! But all was good, as they hugged it out

Demi, who has admitted to troubles with insecurities and weight in the past, has turned to healthy diet and exercise to maintain her trim figure. 

She often posts videos of herself working out at the Unbreakable Performance Center in LA. 

Earlier this week, the singer, who recently wrapped up her Honda Civic Tour with Nick Jonas, shared a tough girl shot of herself completely in the zone during a fitness session.

Fitness: Earlier this week, the singer, who recently wrapped up her Honda Civic Tour with Nick Jonas, shared a tough girl shot of herself completely in the zone during a fitness session.

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