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You saw her in da lobby at Tao, now check her out in da club!

Hotel heiress Paris Hilton was in Las Vegas this weekend filming her MTV reality show in the hopes of finding a new best friend - think any of the girls she's getting her groove on with pass the test? Guess we'll hafta watch and see!

An X17 photog on the scene says Paris "was partying like crazy - she's definitely not pregnant! - and looked like she was having a blast, especially with boyfriend Benji." Aww!

So Ms. Hilton has a reality show at MTV and we spotted her former Simple Life pal Nicole Richie having a meeting at MTV just the other day... coincidence?