Inside Justin Bieber’s Workout Routine!

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Tight Squeeze

Sporty! When Bieber's not on tour or making music, he loves getting athletic with his pals. "We got to gyms and play ball...I play golf sometimes," he tells Luxury Handbag Shopping in Justin Bieber: My Private World.

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Hardcore Pushups

How else does Bieber maintain his rarely-seen six-pack? "He's pretty good about his diet," his voice coach Jan Smith tells Us in Justin Bieber: My Private World. "He eats healthy. He doesn't eat a lot of junk food."

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Bench Press

Perfect day off? "Hanging out and playing beach football," he says.

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Workin' the Biceps

Tweeted pal Rihanna at a recent dinner: "Justin Bieber just flashed me his abs . . . Wow! He actually had a li'l six pack!"

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Feel the Burn

Trainer Quince helps Bieber work on his legs backstage in Greenville, SC Dec. 16.

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Double Trouble

Bieber "loves to run around with his shirt off all the time," Never Say Never director Jon Chu says.

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I'll Spot You, Bro

Bieber "loves to run around with his shirt off all the time," Never Say Never director Jon Chu says.

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Double Trouble

The fitness fan drinks plenty of water -- but only at room temperature! "He's not supposed to drink cold water because of his throat," a pal says.

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Dude Time

How is the teen dealing with his voice changing? "People my age go through puberty, and everything's changing, so I have a vocal coach who helps me," he tells Us.

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Stretches

Does the Biebs ever splurge on junk food? "I love Doritos," he says. "And I keep Fruit Roll-UPs and Cap'n Crunch on my bus!"