Apparently, during her latest Bangerz concert at Tacoma, a zealous fan (with a future in baseball?) threw a thong onto the stage, Mileybird picked it up, and put it into her mouth, like you do.
Come on! This fan-gone-commando clearly does not know where Miley's tongue has been! JK, but SRSLY Miley, you should be more careful. You don't want to get thong-in-mouth disease.
Along with the photo, one fan confirmed on Twitter that it was Mizz Cyrus just in case anyone thought Miley was thong-fully accused: