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If you thought Miley Cyrus’ BANGERZ tour couldn’t get any racier, think again.

The singer, who’s already simulated oral sex on a Bill Clinton impersonator and touched herself on stage, put a fan’s thong in her mouth at Sunday’s show in Tacoma, Washington (photo below).

A Cyrus fan at the show tweeted:

Another concertgoer posted a picture of the star sucking the underwear on the social media site.