Leave it to Paris to class up the vaunted celebrity pastime: In 2009, Hilton was reportedly kicked off a yacht in Cannes for engaging in some naughty behavior below deck with her then-boyfriend Doug Reinhardt. Earlier this year, Paris caused a stir for sunbathing topless on a billionaire’s yacht in St. Tropez. Bauer-Griffin The reality-television star and father of many was spotted in St. Tropez with his first post-divorce GF, Hailey Glassman, on Ed Hardy founder Christian Audigier’s yacht. Paparazzi snapped some choice photos of the action on board, which involved, among other things, a giant yellow inflatable penis. Newscom The notorious party girl was in top form earlier this summer when photographers chronicled her wild night on an heiress’ yacht in St. Tropez, during which (we assume) she imbibed several libations and boogied down with Jackie Collins, Ivana Trump, and Buzz Aldrin. Sipa Was she partying away her guilt? While the testimony the supermodel presented before the U.N. War Crimes Tribunal on her involvement with alleged “blood diamond” purveyor Charles Taylor was being disputed, she partied on a yacht off the coast of Sardinia with Leo DiCaprio, Bar Refaeli, Janet Jackson, Quincy Jones, and Kevin Spacey. Newscom All the world’s a stage for the former Miss Sweden and Playboy playmate, who took time out of her relaxation schedule to pose for paparazzi onboard her yacht in the south of France. Newscom With Idol on hiatus, its host found another way to feed his attention addiction, by engaging in some serious PDA with girlfriend Julianne Hough on his yacht in Italy. The pair, caught canoodling by paparazzi, aren't just a fling: Seacrest met Hough's parents shortly after the yacht trip. Bauer-Griffin The Desperate Housewives star and her NBA all-star husband are big fans of spending time on their yacht. The couple has been spotted enjoying their time out at sea on several occasions, most recently to celebrate Eva’s 35th birthday in Miami. PacificCoastNews.com On her most recent yachting excursions on the Christina O (named after shipping magnate Aristotle Onassis' daughter), the actress remained ever-stylish with bold hats and chic aviators. Newscom