By Rose Walano
Updated: May 20, 2015 @ 4:31 pm
Splash News; Bauer-Grifin

Summer is finally here—and the stars are heading to the beach to celebrate! We spotted Ashley Olsen in Hawaii wearing a zigzag bikini top with black bottoms, and Gabrielle Union at Miami Beach in a white two-piece with orange starbursts and blue string ties. Click through the gallery to see more of 2012's best celebrity bikinis!

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