Heidi Klum flashed her butt and her bikini body in an Instagram post.

Klum got burnt in the Bahamas...and she decided to show the world.

In a NSFW new Instagram shoot, Heidi Klum bared it all--- or at least a bare butt.

The provocative new pics from model Heidi Klum show her in the fun and the sun....and the aftermath, which looked, well, red-not fun at all.

Klum, 40, took to Instagram to show viewers painful sunburn, pulling down her bikini bottoms and flashing her bare derrière in the risque snapshot. Klum captioned the butt- flashing sunburn photo with "Ouch!"

Klum also shared much happier picture. In this one, she's posing on the beach in a bikini. Her flawless figure and cornrow hair are visible-not a burn. There's still a lot of heat in the photo, though. Wow! That photo was captioned a "Thank you for another beautiful day in paradise."

Klum, currently an "America's Got Talent" judge, celebrated the Fourth of July in the Bahamas with her four children and boyfriend Martin Kristen.