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Jessica Simpson is definitely, undoubtedly, absolutely ready for summer. The "With You" singer, 42, showed off her super-strong abs, legs, and arms while modeling a neon green SKIMS bikini that she paired with some cute pink platform heels from her very own Jessica Simpson Collection.

"SKIMS Swim + @Jessicasimpsonstyle Shoes = Neon Energy," she captioned the fun mirror selfie. And her famous pals and fans were totally there for it. Jessie James Decker commented, "🔥🔥🔥", and Margo Price wrote, "Omg so cute! Love the neon." A third commented: "This gives me These Boots Are Made 4 Walkin vibes."

Last year, Jess shared another bikini selfie on her Instagram, detailing her journey to lose 100 pounds three times. "I have gained and lost 100lbs 3x so I never thought this moment could or would happen, but I’m finally spring breakin’ wearin’ a BIKINI!!!!!! Hard work Determination Self Love I enjoyed a good proud cry today 💪🏼☀️💛," she captioned the photo.

Since then, she's been feeling super confident and is letting the people know with her bikini selfies. Jessica told PEOPLE that "the older I get, I lean into the free-spirited version of myself: connecting my personality with my eccentricities! I never let people's judgments get the best of me. My confidence is showing up as I am."

During an interview with Today, Jessica shared that she isn't a scale person. "I have no idea how much I weigh. 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," she said. "I've really tried my hardest to not let that define me."

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