Trouble in Sundance for the Hilton Sisters?

It's (almost) hard to believe that <a href="https://okmagazine.com/search/hilton" target="_blank"><strong>Paris Hilton</strong></a>, who has feuded with just about everyone in the Los Angeles metropolitan area, has anyone left to annoy. Perhaps that's why, according to a new report, she had to go to Park City, Utah, to tick off her own sister.

A story in Tuesday morning's NY Post claims that the celebutante's lil' sis Nicky Hilton is none-too-pleased with her camera-friendly older sibling's new bud Brittany Flickinger, the winner of Paris' recent MTV reality show My New BFF.

"Nicky can't stand Paris' new BFF," the paper quotes one source as saying.

According to the report, Nicky wouldn't allow her big sister to crash with her at boyfriend Jeffrey Katzenberg's house at the Sundance Film Festival in Park City, so Paris had to look a little further down the A-list for accomodations until she got to Aubrey O'Day, who may actually be going for the "My Newer BFF" title, according to the story.

<a href="http://www.okmagazine.com/pixandvids/gallery/9437/" target="_blank"><img src="https://farm4.static.flickr.com/3522/3182836755_e01b1d2e2e_o.jpg" width="426" height="70" alt="paris" /></a>