Singer Demi Lovato recently reunited with their old pal and fellow Disney star, Joe Jonas, for Halloween. Lovato also debuted their new hairstyle, which is a mullet-esque look we just love. How do they look so good while working so hard? Read on to see 5 ways Demi Lovato 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!

Lovato has been open about their struggles with their body, specifically about their struggles with eating disorders. In order to combat their eating disorder, Lovato says that they try not to fall into extreme dieting. Lovato said on the Pretty Big Deal podcast, "I'm tired of running myself into the ground with workouts and extreme dieting. I thought the past few years was recovery from an eating disorder, when it actually was just completely falling into it. And I just realized maybe my symptoms weren't as obvious as before, but it was definitely an eating issue."df44d9eab23ea271ddde7545ae2c09ec

Lovato is also all about body positivity, and isn't afraid to share revealing photos of themself, and talk about embracing their body. Over the summer, they shared a post on Instagram talking about body positivity. They wrote, "I feel the sexiest in the bathtub w no makeup, no extensions, no lashes.. naked. Just me in my purest form. I don't always feel comfortable in my skin/body so I'm beyond grateful that in these moments, when I'm most vulnerable I can feel beautiful & accept myself as is."

Lovato is a huge fan of mixed martial arts and boxing. In fact, they have begun learning martial arts. They said to POPSUGAR, "My favorite workout is jiu-jitsu. I love training jiu-jitsu. When you're rolling with somebody, you're constantly thinking of defending or attacking moves, so it's kind of meditative in a way, but it's also a great workout when you're training — when you're really moving around with somebody."

Lovato has also been open about their struggles with their mental-health, like depression. Lovato believes that taking care of their mental health is extremely important. "I believe [self-care] is like a pyramid," they said to POPSUGAR. "There are three things that you need to feel great. There's physical fitness, nutrition, and mental health." Lovato continued, "I think it's important to take care of yourself emotionally and physically, but mainly emotionally, because if you're not taking care of yourself emotionally, your mind can go to dark places. It's important to learn to love yourself for who you are, and accept yourself."

While Lovato says that they don't want to fall back into extreme workouts again, they are still committed to staying fit. Lovato tells POPSUGAR that they make sure to stay motivated to working out, and encourages others to find something to motivate them. "Put on your clothes, do what you gotta do to get there, have some pre-workout or drink coffee . . . whatever it is! And when you're finally at the gym, you owe it to yourself to take care of your body. If you're feeling sluggish or like you don't want to work out, just remember what good it's going to do for your body and how great you're going to feel afterward."