EWWW! PARIS HILTON NEED'S TO STEP HER GAME UP! WITH ALL THE WHOOTY'S OUT THERE! SHE REALLY NEEDS A BOOTY! HEROINE SHEIK AINT IT ANYMORE!

Has Paris Hilton shed more than just her latest man?
Just weeks after splitting with boyfriend Doug Reinhardt, the heiress was looking painfully thin while hosting the Rehab pool party at the Hard Rock Hotel & Casino in Las Vegas on Sunday.

While the 29-year-old socialite is known for her slim physique, her skimpy party attire – a hot pink bikini and matching sarong -- revealed protruding ribs and ultrathin legs.

Hilton dumped Reinhardt, her on-again-off-again boyfriend of 14 months, earlier this month, according to numerous reports, and has claimed the split hasn't fazed her.

"I am great and enjoying being single," she told Access Hollywood. "He [Doug] is just angry because I broke up with him."

"I need more positive people around me and people who love me for me."

As to why she called it quits with Reinhardt, Hilton told Us Weekly she realized the "Hills" star wasn't right for her.

"I just realized that I'm better off without him," she said. "So I ended it because I deserve something much better. He wasn't right for me and I will eventually find somebody who loves me for who I am."

Hilton claims she is fielding thousands of calls from prospective partners, but claims she is "not ready to be with anyone" yet. One person whose call she is returning, however, is that of ex-fiance Jason Shaw, with whom she was spotted out to dinner recently.

Reinhart is reportedly devastated by the split and has been desperately trying to get Hilton back, but to no avail.

However, the 24-year-old was photographed on Friday night out to dinner at West Hollywood hot spot Boa with a blond Paris look-alike. As to the identity of Doug's mystery girl, sources told RadarOnline.com that he is dating "this really, really cool girl called Whitney."