From lounging on a yacht to motoring on a jet ski, these stars sure know how to soak up the summer fun!

AND — from Kourtney Kardashian pulling a Kim-like pose in a black bikini to Kelly Brook flaunting her flawless curves in a slinky two piece and Lisa Rinna taking her toned tummy out on the water — they all look great while doing it

Scroll through to see our full collection of stars who know how to rock the two piece!