Billie Eilish Rocks Pink String Swimsuit in New Pool Party Photos

Billie Eilish has become one of the world's biggest stars at a young age. She has won the Oscar for Best Original Song twice. She's won nine Grammy Awards. Her hits include, "bad guy", "you should see me in a crown", and "LUNCH" from her recent album. And yet? She knows how to have fun, too. Eilish shared some photos from a pool party on Instagram recently. She wore a pink swimsuit in one photo. How does she stay so fit? Read on to see 5 ways Billie Eilish stays in shape and the photos that prove they work.

As you can see in her Instagram post, Eilish likes to swim to stay in shape. According to Better Health, swimming has a lot of benefits. "Swimming is a good all-round activity because it: keeps your heart rate up but takes some of the impact stress off your body, builds endurance, muscle strength and cardiovascular fitness, helps you maintain a healthy weight, healthy heart and lungs, tones muscles and builds strength provides an all-over body workout, as nearly all of your muscles are used during swimming."

Eilish makes sure to take care of her skin on a regular basis. She talked about this in an interview with Vogue. "I have to do a skin-care routine every single night. For me, I find a lot of peace in it and it brings me back down to myself; I feel like a person when I do it. Taking care of your skin is so, so important just as a person. There is no gender to it."

Eilish makes sure to work out regularly. She revealed to Apple Music that an injury made her take fitness seriously. "It started with 'I can't get injured anymore, can't do it, not going to let myself live like that,'" she said. "Because I lived like that for years. I know that's something a lot of people do, but that was not a thing I did. And it's become such an incredibly huge part of my life and it makes me feel so much better as a person and the way that I can move on stage now."

Eilish makes time for herself by doing things she enjoys. She shared some of her favorites with Allure. "I watch things that bring me comfort, swim in my pool, but I feel best right out of the shower, with my lotions and my smells and I'm in a clean environment. When you're in a shitty spot emotionally, when you change the things in front of you, it can help so much. I'm trying to prioritize. I wrote in a song years ago 'to keep myself together and prioritize my pleasure,' I said that three years ago, and then I didn't do it! "So I'm doing it now. And I've made enough people feel good that I deserve to feel good too."

Eilish talked about letting go of her pain to Allure. "That's the thing about diving into the hurt — I don't need to do that. I'm starting to do better, but I've not been doing so great, to be honest. For a while. I have impending-doom feelings most of the day. When I think too much about it, how I can never have privacy again, it's enough to make you want to do all sorts of crazy things. But you have to let it go."