Halloween is a holiday that gives you the opportunity to feel good and have fun with family and friends wearing funny costumes. Halloween is a yearly celebration observed in a number of countries on 31 October, the eve of the Western Christian feast of All Hallows’ Day.
Among the many costumes that you can find I selected a few that I consider special on Amazon.com:

Star WARS costumes:

Secret Wishes Star Wars Sexy Princess Leia Costume, White, L (10)

Rubie’s Costume Women’s Star Wars Darth Vader Woman’s Deluxe Costume Jumpsuit, Multi, X-Small

Medieval & Renaissance costumes:

Women LG (12-14)- Womens Renaissance/Medieval Guinevere Costume

California Costumes Women’s Lady In Waiting Adult, Purple, X-Large

Mingsha Medieval Dress Renaissance Costume Victorian Gothic marie Antoinette

Witch costume :

California Costumes Women’s Incantasia, The Glamour Witch,Black/Purple,Large Costume

Comic costumes :

Secret Wishes Womens Green Lantern Uniform, Green, Small

Secret Wishes DC Comics Supergirl Corset And Tutu Costume, Red/Blue, X-Small

DC Comics Secret Wishes Sexy Deluxe Batgirl Adult Costume,Bat Girl Black,Medium

Halloween costumes are traditionally modeled after supernatural figures, monsters, skeletons, ghosts, witches and devils. Over time, such outfits used appeared and those of fictional characters, movie characters, celebrities commonplace and generic archetypes such as ninjas and princesses.