By InStyle Staff
Updated May 27, 2012 @ 9:00 am
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Rihanna, Bikini
Credit: Jun Sato/WireImage, Courtesy

Whether you need a suit that will stay on in the surf or just a cute cover-up, depend on the expert advice of beach-loving stars like Rihanna, Cameron Diaz, Heidi Klum and more. Click through for our must-know celebrity bikini tips.