"The Avengers established a pattern, that not only would Widow change her costume and weapons, but also her hairstyle. She was trained to be a chameleon-like spy, so why wouldn't she be constantly switching up her appearance?
Sam: "So what kind of thing likes virgins and gold?" Dean: "P." Sam: "You know, it's comforting." Dean: "What's that?" Sam: "I died for a year, came back, and you're still not funny." Dean: "Shut up, I'm hilarious." - Supernatural "Like a Virgin"