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Everyone’s favorite action figures are going live-action again with G.I. Joe: Retaliation! In the film, stars Channing Tatum, Bruce Willis, and Adrianne Palicki go head-to-head with the Cobra Commander and his team of enemy forces, so we caught up with Palicki to find out how she geared up for battle. “We were trained by Navy SEALs eight hours a day for a month straight, and they covered everything from stunts to unit training,” the star told InStyle.com at the launch for Axe’s Face line. “It was intense, but I was in the best shape of my life! I guess that’s what eight hours a day will do for you.” She had a similar rough-and-tumble approach to her beauty routine on set, too. “I don’t mind heat, but when you’re trying to look attractive, it’s really frustrating when all your makeup is melting onto your face,” she said. “Thankfully, [my character] Lady Jaye isn’t a girly-girl, so I didn’t have to worry about that, but I got to have one glam moment in the film where I’m undercover.” The best of both worlds! Check out Palicki in her ultra-tough role in G.I. Joe: Retaliation, out in theaters nationwide today. Visit gijoemovie.com to find out where it’s playing near you.

Plus, see more movie star workouts in our gallery!

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Joe Manganiello is famous for his biceps, triceps, and all those other ‘ceps—he’s even writing a fitness book to share all his workout tips! And considering that bikini season is just around the corner, we pulled the True Blood star (in Hugo Boss) aside at Muhammad Ali’s Celebrity Fight Night Founder’s Club Dinner in Phoenix this weekend to ask: What’s on his workout playlist? “Metal! Lately, we’ve been doing a combination of either [Pandora's] Metallica channel or the Audio Slave channel,” Manganiello told InStyle.com. “Those give you all of that 90′s music—like Sound Garden, Alice in Chains stuff. It pumps you up.” Aren’t you pumped just thinking about it? Summer, here we come!

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— Lindzi Scharf

The Fast Diet, the British diet book that encourages you to down your calorie count intake to 500 twice a week (600 for men), is a conversation that’s taking over the web. That’s exactly why we opened it up for discussion on InStyle‘s Facebook page, where we asked our more than 580,000 followers if they would consider the slim-fast plan for themselves. Answers: Desiree Duskin of Huntington Beach, California said: ”That doesn’t sound healthy.” Meanwhile, Mary Gentile Wollmann of Parma, Ohio offered her own must-have slim-down trick: “The only way to lose weight is watch your calories and exercise. Simple.” Do you agree? Join the discussion on our Facebook page!

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If you’re one of the millions who made a New Year’s resolution to Get Fit in 2013, you’re not alone. Stars love to keep in top shape, too, like Miley Cyrus, who has been known to frequent Pilates classes in midriff-baring crop tops, thus providing plenty of inspiration to start doing your crunches every morning. And then there’s Kim Kardashian, who simply can’t be kept from an all-black outfit or a good workout—even when she’s pregnant. Will you join them and start your year off with a sweat?

Plus, look cute while you do it! See our favorite fitness gear.

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Calling all fitness buffs: Your post-workout routine can now feel like a spa treatment! Bliss has teamed up with Crunch Fitness, and starting today, the beauty brand’s ever-popular lemon and sage products will be available at Crunch locations nationwide! Members can indulge in the citrus-scented shampoo, conditioner, body wash, and lotion in the gym’s locker rooms, and purchase the products in the Crunch shop as well. Plus, exclusive discounts on Bliss products will be available to Crunch members, with many fun sampling events to come. Now that’s one way to get our endorphins pumping! Head over to crunch.com for more information, and to download a free guest pass.

Hitting the gym? Don’t leave home without one of our celebrity-approved workout playlists!

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