Looks like Miley Cyrus wasn't the only one freeing her nipples over the weekend...

On Saturday Heidi Klum went totally topless for a tanning session in St. Barth, and she kept things pretty skimpy in the back too! The 41-year-old supermodel must absolutely hate tan lines, because this isn't the first time we've caught her doing this. Still, we're sure she could find some bottoms that aren't as weird and bunchy -- these look like underwear to us!

Heidi is vacationing with her 28-year-old art dealer beau Vito Schnabel, and they're coming up on their one-year anniversary. Last April Heidi also went topless when the two were in Tulum, Mexico, so here's to many more half-naked getaways!