Talk about buying the right bathing suit for your body! Yowza! Kate Bosworth is certainly a very slender girl, but she was looking pretty darn hot playing in the water with her boyfriend yesterday. Thanks to this little Hawaii vacation, she and James are quickly moving up the list in my heart of cutest celebrity couples. Ever since Rachel & Adam vacated the top spot and there were rumors of Rachel & Ryan's split, there's been a bit of a void. These pictures, though -- super sweet.

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