In these photos from the filming of Piranha 3D, Riley Steele's breast slips out while she's dancing in a bikini.
But Riley Steele is in no hurry to stick it back in and, in fact, the malfunction gets her in the mood to give Kelly Brook some motorboat action.
Both appear to be enjoying playing around in their bikinis. And why bother covering up when you're going to do a scene swimming naked a few moments later, anyway?
They're all worth a look but watch for our icon in the photos with the exposed breast.
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