Brooke Mueller pAArties It Up!

Brooke Mueller is not gonna let a little threat by knife point get her down!

Charlie Sheen‘s soon-to-be-ex wife was spotted pAArtying it up at Caribou Club in Aspen on Monday.

Mueller, who stayed until closing, was wearing jeans, a green sweater and no makeup, was among the more decked-out stars in attendance, such as Paris Hilton, boyfriend Doug Reinhardt and Gerard Butler.

“Brooke was low-key,” said a source. “She was talking to friends and walking around the small club…you could barely tell it was her.”

A drink may not be what you need, honey!

[Image via WENN.]