Star Bikini Tips

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 Cameron Diaz, Rihanna, Heidi Klum and more. Click on for InStyle's best celebrity bikini tips.

"I love surfing in Pualani Hawai'i bikinis," Cameron Diaz told InStyle. "They're tiny, so you get a really good tan, but they stay on." As for footwear? "Always Havaianas. Preferably in white."

String bikini top in Happiness, Pualani Hawai'i, $69;

"I like wearing a bikini with a cover-up that's loose, not too long and a little bit sheer," Rihanna told us.

Foil cover-up, $50, Topshop;

topshop.com.
Snow leopard-print bikini, $207, We Are Handsome; shoplesnouvelles.com.

"Hands down, my favorite suit is a Missoni," super-stylist Rachel Zoe told InStyle. "It looks almost too sexy to wear on the beach."

String bikini, $365, Missoni;

mytheresa.com.

"At night I love just throwing on a dress over the bathing suit I've been wearing all day," advised Mila Kunis of her summertime look.

Cold-shoulder dress, American Eagle, $39.50;

"You tend to think the more skin the better when it comes to swimsuits," Heidi Klum told InStyle. "But all it takes is one look at a hot maillot to change your mind." That said, a "twist bandeau is great for cleavage."

One-piece, Miu Miu, $215;

"When it comes to bathing suits, I have several by Lauren Moffatt," Kristen Bell told us. "J.Crew also has a good selection, with lots of different shapes, from string bikinis to boy-cut, that you can mix and match."

Ruched top, J.Crew, $44;

"Hot pink is edgy, plus it makes a good tan seem even better," said Cassie.

Bikini, Michael Kors, $235;

net-a-porter.com.