Jessie James Decker in Bathing Suit is "Cool for the Summer"

Jessie James Decker is showing off her super fit figure with friends. The singer and fashion designer (of the Kittenish line) danced with pals to the Demi Lovato song "Cool for the Summer," even acting out some of the lyrics. (At the line "Got a taste for the cherry, I just need to take a bite," someone pretends to chomp an arm, to laughter.) How does the 33-year-old keep herself so fit? Read on to see 5 of Jessie James Decker’s top tips for staying in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

1. She Works Out Hard

Jessie James Decker/Instagram

Jessie is serious about exercise, regularly weight training. She recently shared an Instagram video of her routine. She started the workout with 30 seconds of jump rope, high-knee running, ankle grabs, high kicks, lunges and lateral lunges, spinal rotations, and tension squats. Next up, she did overhead squats with resistance bands, medicine ball slams and tosses, medicine ball chest passes, medicine ball sit-up tosses, resistance band pulls, deadlifts, step-down exercises, weighted overhead presses, inverted rows, bent over kettlebell rows, weight plate steering wheel exercises, dumbbell rotations, and box jumps. "I work out 3 to 4 times a week and they pretty much look like this with certain variations whether we're doing more upper body or lower body," she revealed.

2. She Fasts

Jessie James Decker/Instagram

Jessie doesn’t officially intermittently fast, but she doesn’t eat for long stretches of time. Her diet closely resembles the 16:8 fasting routine, she told Women’s Health. "I eat what I want to eat within that time frame but don't overdo it," she explained. "The timing really is important to me."

3. Her Diet Is Protein Rich

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Jessie focuses on consuming a lot of protein. Breakfast might be a bowl of oatmeal or toast and coffee with cream. After her workout, she will sip on a protein shake. "For lunch, I will have 4 to 6 ounces chicken salad or chicken over rice," she revealed on Instagram. "For dinner, I will either have a lean red meat, like flank steak with vegetables, chili from my book, or the same kind of thing—chicken and rice vegetables or my fit-enchiladas from my first book.”

4. She Has Lots of Healthy Meals in Her Freezer

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Jessie always has healthy frozen meals from Trader Joes on hand. "They are so good if I don't have time to make myself lunch," she told Women’s Health. "I get the Indian curry or butter chicken and rice meals, and they are so delicious and filling. I have stashes of them in the freezer in the garage. I never want to run out."

5. She Doesn’t Skip Workouts

Jessie makes exercise a priority and even works out while on vacation. “Got in at 1:30 am last night from shooting a music video( deets on that coming soon)! But I wasn’t about to miss my work out! Gotta get it in!!! Here’s some snippets from this morning💪 (also if I’m in charge of the music and Eric doesn’t take over, I play @nickelback to get my hyped,” she captioned a recent post.