"Merry Christmas THANK YOU NY for being one of the few states to @freethenipple," she captioned the picture.
Free the Nipple is an independent documentary that comes out in theaters in January 2014. It challenges censorship laws in America, arguing that violence is less censored than nipples. Cyrus, 21, has supported the film numerous times.
The former Disney star, of course, is no stranger to stripping down. In the Terry Richardson-directed music video for her hit "Wrecking Ball," Cyrus went completely nude.
The singer has also attended several public events in see-through outfits with pasties over her nipples. On Dec. 13, Cyrus attended Z100's Jingle Ball at Madison Square Garden in NYC where she performed in a red sequin two piece while twerking on Santa Claus, which has happened several times this holiday season.