Don't be surprised if PAN AM attendants or Charlie Sheen come knocking on your door this Halloween!

Yahoo released its annual lists of most-searched costumes:

Top Searched Adult Costumes on Yahoo!

1. Star Wars
2. Vampire
3. Pan Am Costume
4. Superheroes
5. Catwoman
6. Eighties
7. Indian
8. Wizard of Oz

Most searched controversial costumes on Yahoo!, include:

1. Charlie Sheen
2. Casey & Caylee Anthony
3. Amanda Knox/Jessica Rabbit
4. Osama Bin Laden
5. Chaz Bono

Top Searched Celebrity Costumes (this month):

1. Lady Gaga
2. Nicki Minaj
3. Katy Perry
4. Justin Bieber
5. Snooki
6. Dog the Bounty Hunter
7. Taylor Swift
8. Charlie Sheen

Star Wars topped the adult category, followed by vampires, Pan Am flight attendants, and super heroes.

Of course, real-life is often the catalyst for Halloween costumes. Topping the most controversial list? Charlie Sheen! Casey Anthony, Amanda Knox and Chaz Bono also made the cut.