She's just being ... Nicki?

Miley Cyrus showed off her Nicki Minaj Halloween costume last night on Twitter, posting a pic of herself with a giant yellow wig, tatted-up arm, leopard print bodysuit and some major butt padding.

" you a stupppppiddddd hoe," the singer/actress tweeted at her costume inspiration ... who has yet to respond.

While we don't know what Minaj thinks of the costume yet, we think Miley really pulled it off!

What do you think? Sound off below -- and check out more celebrity Halloween costumes in the gallery above.

Who's your favorite so far?

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