By InStyle Staff
Updated May 27, 2012 @ 9:00 am
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.