Jessica Simpson in Bathing Suit "Lost 100 Lbs"

Jessica Simpson is celebrating her weight loss in the best way. By putting on a new bathing suit. Simpson posted a photo on Instagram of herself posing in a pink paisley number. She captioned the photo, “I have gained and lost 100lbs 3x so I never thought this moment could or would happen, but I’m finally spring breakin’ ... Hard work. Determination. Self Love. I enjoyed a good proud cry today.” Read on to see 5 ways Jessica Simpson stays 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 Loves Yoga

One of the ways Simpson stays in shape is by practicing yoga. She posted this photo on Instagram of herself doing yoga outside. She was in the warrior one pose by her pool. Simpson captioned the photo, “Starting the week with a warrior mindset aligned with the beauty of the sunset.”

2. She’s On The “Body Reset Diet”

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Simpson works with celebrity trainer, Harley Pasternaak, to help her stay in shape, and help her eat right. Pasternaak tells People that after Simpson gave birth to her third child, he put her on his “Body Reset Diet”, to help her lose weight. “It’s three meals and two snacks a day, and each meal has protein, fiber and fat, and snacks are protein and fiber or protein and fat,” he says. “She’ll have foods that are very flavorful that are healthier versions of things like a tortilla soup or Tex-Mex. And if she has a birthday party one night and a date night another night, she’s going to indulge both of those nights, but that’s it. It’s about balancing in a way that doesn’t make it painful or too much of a departure from your life before that.”

3. She Sets Goals

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Pasternaak tells People that he doesn’t have Simpson use a scale in his work with her. He says that he has her set different goals for herself, which include a list of daily tasks. “My work with her is more about the habits she’s created and kept up. Every night before she goes to bed she sends an email showing that she hit all five tasks, so she’ll go to bed feeling successful. She’s hit her step goal, she’s eaten well, she’s balanced her responsibilities — so she can go to bed with a sense of fulfillment, and that’s everything. And as a byproduct of doing these habits, she lost 100 lbs.”

4. She Doesn’t Weigh Herself

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Simpson said on the Today Show that she doesn’t like to weigh herself. Instead, she focuses on how she feels, and how her clothes fit. "I have no idea how much I weigh," she said. "Like, I just want to feel good and be able to zip my pants up. If I don't, I have another size. I have every size."

5. She Got Sober

Simpson is open about being sober, and celebrated four years of sobriety this past year. In a revealing Instagram post, Simpson reflected on her sobriety. She wrote, “This person in the early morning of Nov 1, 2017 is an unrecognizable version of myself. I had so much self discovery to unlock and explore. I knew in this very moment I would allow myself to take back my light, show victory over my internal battle of self respect, and brave this world with piercing clarity. Personally, to do this I needed to stop drinking alcohol because it kept my mind and heart circling in the same direction and quite honestly I was exhausted. I wanted to feel the pain so I could carry it like a badge of honor. I wanted to live as a leader does and break cycles to advance forward- never looking back with regret and remorse over any choice I have made and would make for the rest of my time here within this beautiful world.”