In photos posted to her Twitter account early Thursday morning, the 20-year-old singer showed off her Halloween costume, a pretty spot-on version of rapper Lil' Kim's shell-pasty outfit from the 1999 awards ceremony.
"Happy Halloween @LilKim," Cyrus captioned one of several photos of her racy costume.
"Awwww. Look at my baby @mileycyrus tonight!!!" Lil' Kim tweeted back. "Looking GORGEOUS!!! I wish I was there to squeeze your boob :) :) Love U so much !!!! #mytwin."
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