Halloween is upon us and every man knows what that means: it's time for sexy costumes. This is the best time of the year! Women dress sexier than ever and no one bats an eye. It's even encouraged because it's all in the name of good Halloween fun. Get your Hallo-peenhard with these GIFs of women wearing their sexiest Halloween costumes in TV and movies.

Lauren Ash in Superstore

Rachel McAdams inMean Girls

Alandrea Martin in Suburban Cowboy

Jessica Alba in Idle Hands

Linnea Quigley in Night of the Demons

Jacqueline Tavarez in Tromeo and Juliet

Emily Deschanel in Bones

Eva Longoria in Desperate Housewives

Lorali Hart in Orgy of the Dead

Ally Maki in Wrecked

Kelly Monaco in Idle Hands

And finally, all hail the queen of sexy Halloween, Elvira (Cassandra Peterson)!