If you're sick of Miley Cyrus now, you're in for a real disappointment this Halloween. Thanks to the her twerk-tastic performance at the VMAs, the pop star is slated to be the most popular costume this Halloween. Miley "twerk" costumes are reportedly flying off the shelves at Halloween stores, and online retailers like Amazon and eBay are selling booty shorts, leotards and shirts with teddybears, as well as that foam finger. There are even how-to sites that show you how to make your own Miley costume, complete with red lipstick, ponytail buns and platform All Star Converse. Looks like it's going to be a scary Halloween.