Nicky Hilton (2009)
The Look: A bouffant and low chignon for Breakfast at Tiffany's Holly Golightly
Hair Scare Factor: Zero. An elegant updo is standard issue for this classic costume.
Lauren Conrad (2008)
The Look: Loose waves and a feathered headpiece for a 1920s flapper
Hair Scare Factor: Non-existent. A Jazz Age-inspired costume only means romantic accoutrements.
Miranda Kerr (2011)
The Look: Tight curls under a top hat for a circus ringmaster
Hair Scare Factor: None. As the determining component of the costume, the hat does all the work.
Beyoncé (2011)
The Look: Side-swept highlighted bangs for a bumble bee
Hair Scare Factor: Nil. Like her costume, Bey kept her 'do uncomplicated.
Ashley Greene (2009)
The Look: A feather-adorned half-up-half-down hairstyle for a peacock
Hair Scare Factor: Low to none, if only for the bouffant's high drama.
Kate Upton (2011)
The Look: Mussed waves for a zombie Marilyn Monroe
Hair Scare Factor: Low. Any undead angle requires a few flyaways at the very least.
Anja Rubik (2011)
The Look: Bedhead hair for a gypsy
Hair Scare Factor: Minimal. Nothing spooky about tresses with a little texture.
Rachel Zoe (2009)
The Look: Braids and piece-y locks for a...couture Native American look?
Hair Scare Factor: Moderate. A disheveled mane would be one thing if the costume were clear—otherwise the look is confusing.
Elettra Wiedemann (2011)
The Look: A deep side part with teased tresses on another unclear but heavily-accessorized costume
Hair Scare Factor: A creepy medium. In this case, the look is less confusing and more copycat-worthy.
Blake Lively (2009)
The Look: A blunt-bobbed brunette wig for a flight attendant
Hair Scare Factor: Neutral. Points for incorporating a wig, albeit a safe one.
Petra Nemcova (2007)
The Look: A crimped and beaded wig for Cleopatra
Hair Scare Factor: Minor. Again, it's all part of completing the costume.
Ciara (2010)
The Look: A sharp platinum blond wig for X-Men's Storm
Hair Scare Factor: Borderline moderate. On the singer, Storm's legendary locks are shocking at best, expected at worst.
Sophia Bush (2010)
The Look: A plastic-y colored wig for Katy Perry
Hair Scare Factor: Benign. You can't go wrong wearing one of the most in-demand costumes.
Brooklyn Decker (2010)
The Look: An electric pink wig, just for kicks
Hair Scare Factor: Harmlessly excessive. What else would the everyday rocker ballerina's hair look like?
Kim Kardashian (2011)
The Look: Fiery red locks for Batman villian Poison Ivy
Hair Scare Factor: Up there. Vibrant, ember-like locks make the verdant duds truly villianous.
Fergie (2011)
The Look: An oversized crown lopsided atop an overdone updo for a Toddlers in Tiaras contestant
Hair Scare Factor: Reasonable. An exaggerated, accessorized wig is a winning topper for this costume.
AnnaLynne McCord (2011)
The Look: A plaited, teased-out cloud of a wig for a modern-day Marie Antoinette
Hair Scare Factor: Major. The Dauphine du jour's crown is nothing but disturbing.
Debra Messing (2011)
The Look: An extravagent wig with flowers for a Dia de los Muertos celebrant
Hair Scare Factor: Very high. The actress took her Day-of-the-Dead costume rather gravely.
Kate Beckinsale (2010)
The Look: A full-blown wig for the Bride of Frankenstein
Hair Scare Factor: Extreme—a textbook example of a hair-raising Halloween look done right.
Selita Ebanks (2009)
The Look: Horns and a sleek, dyed plaited style for a seductive devil
Hair Scare Factor: Impressive—and practically speaking, the horns serve as the only reminder of what the costume actually is.
Heidi Klum (2005)
The Look: A larger-than-life wig for a vampire
Hair Scare Factor: Gratuitous. Only the queen of Halloween could get away with putting this much hair on a vampire.
