Summer's almost over, but the hottest celebrities in Hollywood have spent the season soaking up the sun in sexy swimsuits. From classy cut-outs to barely-there bikinis, celebs rocked it all, sharing their most fashionable moments on Instagram.
Here's a look at the most daring swimsuit moments of summer 2015!
1. Bella Hadid Bares Her Booty
The model -- and younger sister to Gigi -- went all out in this black thong bikini back in May.
2. She Got It From Her Mama
Bella then shared this pic with her mom, The Real Housewives of Beverly Hills star Yolanda Foster, on "Mommy n meee day" in August, proving that the 51-year-old's still got a rockin' swimsuit bod.
Ageless model Christie Brinkley stunned in this snap from her family's picturesque Italian vacation in July.
4. 5. and 6. Crazy for Cutouts
Jessica Simpson and Kylie Jenner rocked the same black Dakota cutout swimsuit by Agent Provocateur in Instagram shots in July.
The fashion statement was a family affair for the Jenners, as big sis Kendall donned the same suit for an Allure photoshoot back in February.
Kate Hudson went for the nude look on a European vacation in June. "When in Greece..." the actress captioned the pic.
Demi Lovato donned this skimpy top to debut her seasonal single, "Cool for the Summer," in July, nearly breaking Instagram's famous "no nipple" policy.
Kylie Jenner makes the list a second time, for her daring faceless shots of her bikini bod.
Kendall makes the list again as well, with a wild white cutout suit she sported on the cover of GQ.
But of course, Kendall and Kylie couldn't take the crown from their big sis, Kim Kardashian, who didn't let being pregnant stop her from some fairly daring swimsuit moments of her own!
In fact, Kim used her baby body to her full advantage, rocking major pregnancy cleavage on her Instagram shots all summer!
Which dare-to-bare moment was your favorite of summer 2015? Let us know on Twitter with the hashtag #etnow!