It's no surprise that Miley opted for a controversial outfit yesterday (30 October), since she is frequently seen in unusual items of clothing that leave little to the imagination.
However, this time she decided to take inspiration from a fellow artist's wardrobe and flashed her boob in Lil Kim's notorious MTV VMAs red carpet look from 1999.
Kim turned heads at the Video Music Awards in 99 by arriving in a purple catsuit, which was covered in a leaf pattern and cut away at the breast to reveal a sequin design stuck over her nipple.
20-year-old Miley copied the rap star's outfit down to the sequin nipple tape and even sported a long purple wig to match Kim's.
And she couldn't wait to show Kim (and her fans) what she was dressed as for the popular American holiday..
Miley tweeted a few snaps from her spooky night out and captioned one of the pictures: "Happy Halloween @LilKim", so that her idol could see the completed look.
Unsurprisingly, Kim was flattered by the pop songstress using her VMA outfit as inspiration and sounded impressed with all of Miley's photos.
Re-tweeting one of the snaps for her own fans to see, 39-year-old Kim wrote: "Awwww. Look at my baby @mileycyrus tonight!!! Looking GORGEOUS!!! I wish I was there to squeeze your boob :) :) Love…"
Miley is no stranger to turning shocking guests at the MTV VMAs either, so this Halloween costume seems even more fitting for the star.
This year, Miley received an onslaught of criticism for her performance with Robin Thicke at the Video Music Awards, which saw her grinding in a tiny lycra two-piece and twerking on the 'Blurred Lines' singer while surrounded by giant teddy bears.
So a love for revealing clothes isn't the only thing Miley and Lil Kim have in common!
What do you think of Miley's Halloween costume? Let us know below, as the best comment each week wins £50!