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Miley Cyrus, Instagram

Instagram

We've seen her underwear, twerking skills and of course her tongue.

But on Saturday night, fans of Miley Cyrus were actually able to see the singer's boobs up close and well, personal.

In a NSFW Instagram, the "Party in the U.S.A." singer posed topless in support of the Free the Nipple Campaign.

"Some lame ass deff gonna [flag] that but f--kkkkkkk it," she captioned while resting her left arm across her chest. "#practicewhatchupreach #FreeTheNipple #FreedatShit."

The 22-year-old has been supportive of the movement that aims to end the media's "glorification of violence and repression of nudity."

Miley Cyrus, Twit Pic

Twitter

Late last year, Cyrus posted a picture of herself (fully clothed this time) with a rubber nipple and gave a shout-out to the cause.

Rumer Willis, Scout Willis, Lena Dunham and Liv Tyler have also expressed their support for the equality movement that "stands against female oppression and censorship" while helping to "empower women across the world."

As Smilers know, Cyrus has never been one to hold back when it comes to sexy shoots or music videos. 

In fact, during a recent interview with BBC's Newsbeat, the former Disney darling expressed her frustrations at men being held to a different standard than women.

"Guys get to show their titties on the beach, why can't we," she asked. "I don't understand the double standard of life."

She added, "I feel like I'm one of the biggest feminists in the world, because I tell women to not be scared of anything."