Try this stylish site for sexy suits from Roberto Cavalli and more. Though the selection isn't huge, the unique suits are worth a look. Victoriassecret.com
If you’re a fan of their bras, you'll find the same styles and support in their bikini and tankini tops. Bottoms and tops are sold separately, so you can find the best fit for your figure. Net-a-porter.com
Take your designer fetish to the beach! This site carries hot brands like Diane von Furstenberg, D&G, Missoni and Pucci in a variety of styles and splashy prints.
At left: D&G Dolce & Gabbana red-and-white striped bikini, $215; at net-a-porter.com