Rihanna Leads Celebrity Skinstagram Parade

Riri leads the pack, posting pix from a bikini adventure in her native Barbados. The 27-year-old stunner caught some rays in a yellow bikini while decked out in jewelry from designer Jacquie Aiche.

RiRi was not content with one teeny-tiny yellow (no polka dot) bikini, she also posted a shot with best friend Melissa Forde.

You can't have a swimsuit roundup without somebody from "Keeping Up with the Kardashians," and to that end, we bring you 17-year-old Kylie, who posted this pic with the caption, "Kourtney and Ky swim session."

For her part, Kourtney showed off her post-breakup body in a one-piece while boating with friends.

Celebri-guys can take off their clothes, too! "Supernatural" star Jared Padelecki and The Arrow himself, Stephen Amiell, make the point with this shirtless snap on a dock. His caption, "Stay Sunday Strong," is a reference to Jared's campaign to raise awareness for depression.

Model Bella Hadid and her reality star mom Yolanda Foster went mommy and me with this poolside pic.

Katharine McPhee may have won the Skinstagram game with her series of posts from Cabo, Mexico. Not just ON a boat...

but jumping off a boat!