Miley Cyrus curses at 'fan,' explains her actions via Twitter

Miley Cyrus is trying to enjoy her vacation -- and seeing as she's hanging out with her boyfriend Liam Hemsworth and his hunky bro Chris, that shouldn't be too hard. But an uncomfortable incident with a fan took a bad turn when the fan got aggressive.

Miley took a few pictures with fans when her helicopter landed in Costa Rica, but when she explained that she had to leave the area, the fan called her an "a**hole"! Not cool. Miley turned around, clearly perturbed, and said, "What the f***? Are you for real? We're on vacation!"

Miley wanted to clarify the incident, because video hit the web. "Been trying not to tweet & just enjoy the holidays but just to clear something up I would NEVER swear to a fan. When someone yells something SO rude making ME look like an 'a**hole' in front of fans who I am more than happy 2 take a picture w/ i cant tolerate that kind of rudeness," she wrote. "Every1 who was there apologized 4 the womans brusque behavior. She obviously wasnt a fan. Hope every1 has a Merry Christmas! LOVE 2 ALL!"

We gotta say, after watching the video -- we're Team Miley on this one! (Muffled harsh language on this one.)