Here's Old Navy's one shoulder bandeau. It's simple, black, and CHEAP! $16.50 is a small price to pay to be the chic-est biddy at the pool!
European website, ASOS, offers a different take on this style. The sunny color is to die for (it also comes in black), while the ruffles give it a femme vibe. You'll have to splurge a little more for this baby though - $84.27, but there's free shipping!
I don't know about you, but I'm so ready to hit the water in this new look!