Emma Roberts Dresses Up as Prostitute in Halloween Party

Emma Roberts was a bad girl. She dressed up as a prostitute at the Rachel Zalis and Mike Meldman's "Nightmare on Arden Street" Halloween Party on Friday, October 26. It was not just a random slut costume. The 21-year-old actress channeled Vivian Ward, the famous character her aunt Julia Roberts played in "Pretty Woman".

The "Scream 4" actress wore a short blonde wig, white tank top and super short miniskirt paired with thigh-high black boots. She attended the party with her boyfriend, "American Horror Story" actor Evan Peters. While Emma dressed up as a hooker, Evan dressed up as a cowboy. The 25-year-old actor wore a straw hat, plaid shirt, jeans and brown boots.

Recently, the young star was announced as the Fashion Adviser for Snapette, a mobile application for Andriod. "It's so exciting for me to be part of a new product that is completely changing how people shop," Emma revealed her excitement in an interview.

"Snapette hits the mark by combining mobile and local fashion shopping. Online shopping is great, but I love going out and shopping in person," the actress added. "Snapette helps me browse products, stores and sales around me right on my phone. It's fun, easy and saves me time in my busy schedule!"

Emma's newest project, "We're the Millers", will hit big screen next year. The movie tells about a fake family who smuggles pounds of pot across the Mexican border in a road trip. Jennifer Aniston and Jason Sudeikis star as Emma's fake on-screen parents.