Gwyneth Paltrow raised eyebrows with her stripped-down sauna photo. (Photo: REUTERS/Mario Anzuoni)

Gwyneth Paltrow’s latest Instagram may be too hot to handle.

The 47-year-old actress and lifestyle guru caused some temperatures to spike this weekend when she shared a photo of her lounging in an at-home sauna while wearing nothing but a pair of bikini bottoms. The star draped her arms over her chest for the revealing photo, but the rest of her exposed body has commenters fired up.

While Elle Macpherson, Kate Hudson and Busy Philipps were fixated on enjoying a “pre-Christmas schvitz” of their own — Goldie Hawn chimed in to call the Clearlight infraref model “the best sauna ever” —

”How are you aging backwards?” one fan asked Paltrow, who appears to be makeup-free in the pic.

“Holy hottie,” a follower wrote, while another added, “She’s servingggggg.”

“Amazing woman, so strong and confident in the person she is!” a commenter said of Paltrow. ”Showing the world her natural beauty.”

Of course, the Goop founder isn’t merely trying to beat the winter chill. Clearlight claims its infrared saunas have health benefits, ranging from boosting the immune system to easing joint and muscle pain.

Meanwhile, the red-hot comes a few months after Paltrow came under fire for sharing a nude photo which critics claimed glorified a too-thin body type.

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