Addison Rae Shows Off Her Washboard Abs And A Peek Of Underboob In A Cutout Dress

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• Addison Rae, 21, just revealed her toned abs at Elle's 27th Annual Women In Hollywood Celebration.

• She rocked a black, cutout dress with a sliver of underboob.

• Addison swears by Pilates classes and her favorite booty workout to stay fit.

Addison Rae looked super strong and glowy at Elle's 27th Annual Women In Hollywood Celebration. The He's All That star, 21, turned heads in a black, cutout dress with a hint of underboob that totally shows off her toned bod.

Her core looks so sculpted, and those legs? Killer. Addison posted a few snaps from the event on Instagram, and fans in the comments couldn't help but notice how fit she looks.

Khloe Kardashian was so floored, she had to leave two comments: "😍😍😍😍😍😍," and "beautiful!!!!!!" Another user wrote, "goddesss🤯🤯🤯," while someone else added, "addison rae. that’s it. that’s the comment."

It's a pretty iconic 'fit—see for yourself:

Here's another angle that's all about Addison's toned legs:

(Btw, if you're envying Addison's cutout dress moment, you can grab a similar one right here.)

So, just how does this TikTok star-turned-actress stay in shape? For starters, she's a huge Pilates fan. She's been spotted leaving a class with her gym bestie, Hailey Bieber, in the past, according to the Daily Mail.

And, Addison also gets her sweat on at the Dogpound gym, where fellow celebs Vanessa Hudgens and Kaia Gerber have also crushed some intense workouts. Addison popped up on the gym's Instagram account over the summer while conquering some seriously impressive moves. In the video, she powers through a battle ropes session and some bear plank kickbacks (using ankle weights for extra resistance):

So, she's definitely not afraid of a challenge in the gym.

Addison's other go-to is a six-minute booty workout that has Kourtney Kardashian's stamp of approval, according to E! News. "I've done this butt workout so many times because it literally burns so bad but it's so good," Addison explained to Kourtney in a recent YouTube video.

Addison's routine includes donkey kicks, fire hydrants, and fire hydrant extensions on each leg. It's quick, but definitely effective, if Addison's super fit bod is anything to go by.

"I have such a good butt workout that I wanna see how yours is and then I feel like we should do other day where I show you mine," Kourtney added at the end of the video. Tbh? I'd watch it!

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