Miley Cyrus bared her breast in a provocative Halloween outfit last night.

The 20-year-old pop star dressed up as rapper Lil' Kim for a costume party, sporting a purple one-shouldered jumpsuit which left her entire left breast exposed. The "Wrecking Ball" hitmaker - who was also adorned a matching purple wig - covered her modesty with the use of silver and purple glitter in the shape of a flower petal. Miley shared pictures of the raunchy outfit on Twitter, with one caption reading, "Happy Halllllloweeeen [sic]."

The singer's bare-breasted snaps highlighted her infamous "Just Breathe" tattoo, which she got at the age of 17, located under her left breast on her ribcage. Miley also posted a close-up of her purple wig, reminiscent of the colorful hairpieces worn by troubled child star Amanda Bynes earlier this year, captioning it, "SHHHH*tzzzz A WIGGGG [sic]."