The Hills is known for catfights, so it's only fitting that one of its beloved stars take the stage with the Pussycat Dolls.

Okay, it makes no sense at all. But it's happening just the same.

Lauren Conrad's BFF and roommate, Audrina Patridge, will appear alongside the Las Vegas Pussycat Dolls show inside Pure Nightclub on March 28.

The event will celebrate the new season of The Hills. No word on whether Audrina will fill the vacancy left this week by the departure of Carmit Bachar.

Audrina Patridge will be an honorary member of PCD. 

Sources say that Patridge will don the skimpy burlesque outfit (hot!) that the Pussycat Dolls are famous for to introduce the performers.

What else she might do has yet to be determined, but celebrity hosts have sung, danced in a champagne glass, and swung from the ceiling on a swing.

Past hosts include Paris Hilton, Pamela Anderson and Denise Richards. Pretty good (and by good we mean dreadful) company for Audrina Patridge.