Sauna Stars -- Don't Sweat It!

As it starts to get chilly these stars are stayin' in, and making sure they're lookin' hot (and humid) while they do it!

Instead of having to hit the gym, stars such as Charli XCX, Zac Efron and Cindy Crawford are just a few of the famous faces heating things up and sweating it out!

These sexy stars have been sharing their steams and now you can take a deep dive through our gallery of celebs in the sauna ... catch a glimpse of all the celebs trying to stay warm while still looking good!!!