What happens in Ibiza doesn't always stay in Ibiza.

Suddenly world-famous royal bridesmaid Pippa Middleton caused a web sensation last week with the release of an old photo in which Duchess Kate's sister, 27, danced in a bra with a half-naked male pal.

That pic was nothing compared to just-released 2006 photos of the stylish socialite and entrepreneur partying on a yacht in Ibiza with her famous sister, 29, and future brother-in-law Prince William, 28.

Pippa and Kate wore nearly matching white bikinis — and rocked similarly fit bods — as they lounged aboard a sun-soaked yacht with a privilege group of pals.

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In one shot, Pippa showed off her prowess in the water — doing a backwards dive into the sea! Despite her new status as a global sex symbol, Pippa is way more than a pretty face. See more photos of Pippa's bikini bod.

In summer 2010, she launched The Party Times, an online party mag, and is an ambassador for Too Many Women, a charity which raises funds for breast cancer research.

Named the number 1 Society Singleton in a 2008 list by Tatler magazine, but is currently dating London cricketeer Alex Loudon, 30.

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