I can’t catch up with her, just last week Paris Hilton was spotted with Mischa Barton’s ex, billionaire heir Brandon Davis, who by the way looked like a drunken monkey on that photo.

Paris Hilton has been making the L.A. club rounds with her new beau, Greek shipping heir Stavros Niarchos (a.k.a. Mary-Kate Olsen’s ex). And the nightlife-loving pair haven’t been shy with their affection.

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Recently, the couple hit Los Angeles club Mood, where they holed up at a VIP table. They kissed and cuddled throughout the night, and at one point, Hilton stood on the couch with her arms around Niarchos’s neck and proceeded to make out with him.

Two nights later, they headed to the Spider Club, showing up at about 12:45 a.m. with an entourage of seven friends. The group joined pals Bijou Phillips and Danny Masterson in a booth and as soon as they settled in, Hilton and Niarchos began – you guessed it – smooching.

When they weren’t cozying up to each other, they were playing bartender. Niarchos made cocktails with vodka, cranberry and orange juice, while Hilton passed a bottle of tequila around the table followed by a can of Red Bull. The hotel heiress also danced with Niarchos to DMX’s "Ruff Ryders Anthem," Toni Basil’s ’80s classic "Hey Mickey" and N.E.R.D.’s "Lap dance," during which she performed a playful dance of her own.