Paris Hilton caused some derriere drama last week when she slammed ex-BFF Kim Kardashian's booty in a Las Vegas radio interview.

“I would not want [Kim's butt] — it’s gross!" she dissed. "It reminds me of cottage cheese inside a big trash bag."

The heiress later issued an apology — and Kardashian tells Usmagazine.com she gladly accepts it.

"Paris and I have been friends since we were kids, and it was good to hear her side of the story and have her apologize," she says. "I love my curves!"