If you are worrying about picking out your costume , you can ask some of our favorite designers for their tips on putting together a costume in a pinch.

Celebrities pulled out their best costumes for the spooky soirees.Kim Kardashian(following her own advice) dressed up as a platinum blonde mermaid for the Midori party she hosted in New York.The pregnant mom ,Jennifer Garner,took on another role—witch!

Jennifer Garner Halloween

Lauren Conrad,the reality-star-turned-fashion-designer, reworked a cute red and white polka dot dress into a Minnie Mouse costume.

Lauren Conrad Halloween

The burlesque star pulled a piece out of Dita Von Teese’s closet for Maroon 5’s Hollywood Halloween. “Last minute decision to go out for Halloween…Scraping through my wardrobe for something that resembles a costume. No problem!” she Tweeted of her emergency costume.

Dita-Von-Teese-2011-Halloween-costume