Halloween is definitely not for kids anymore, Hollywood celebrities are looking forward for this time of the year to dress up as fashionable witches or any scary characters they can think of and strut their fancy costumes to the hundreds of Halloween parties around the country.

Here are some Hollywood celebs in their spookiest costume as they head to Hollywood's trendiest party.

Shenae Grimes - The 90210 star sizzles in her green Poison Ivy costume together with her husband Josh Beech as they head at the Midori Green Halloween Party at Bootsy Bellows night club in West Hollywood. Grimes was adorned with greenery twined around one of her black thigh-high boots, and her eyes were made up in exotic shades of yellow and brown under her winged mask. Her husband Josh looked distinctly eerie as the Joker, channeling the late Heath Ledger look.

Paris Hilton - Nothing can ever be spookier than dressing up like Miley. Paris Hilton had her tongue wagging as she entered Playboy Mansion's notorious Halloween bash on October 28. The hotel heiress dons Miley's drunk sexy bear outfit with bedazzled foam finger and a pair of heart-shaped glasses to make it her own.

Sandra Bullock - Hands down to the "Gravity" star, Sandra Bullock and son 3-year-old son Louis went trick-or-treating with matching skeleton costumes. Bullock was dressed as a Mexican Sugar Skull with a dress the goes with her exotic face art.

Fergie and Josh - Known as Hollywood's sexiest couple, Fergie and Josh are unrecognizable in their halloween costume. Fergie are all glammed up as Morticia from "The Addams Family" and Josh was a sight for sore eyes dressed as Riff Raff from "The Rocky Horror Picture Show." The new parents are spotted in Kate Hudson's annual Halloween party on October 26.

Slash and Perla Ferrar - The Guns N' Roses star and wife Perla Ferrar are dressed up as zombies and the couple could never looked horrifyingly fantastic as they attended a party in Los Angeles on October 26.

Snookie and JWoww - The two Hollywood Celebs dressed up as the Red Witch and White Witch from "Alice in Wonderland" for the Night of the Living Drag on October 25.