It's been all about pool parties and bikinis for Katie Holmes this summer! And there's nothing wrong with that—sounds like a pretty fabulous time to us.

But with every snapshot of this bathing-suit-clad babe, the buzz has been building about how thin Katie's been appearing...



This weekend, while hubby Tom Cruise was busy filming Rock of Ages, the 32-year-old actress stripped down into a skimpy black bikini before hopping into a Miami Beach hotel pool with 6-year-old Suri—and revealing a whole lot of, er, ribcage in the process.

Maybe Katie was just sucking in for a second or flexing her abs?

actress stripped,Katie Holmes,pool parties,Scary-Skinny,ShowBiz