GQ has profiled Chris Chaney, the hacker who leaked nude photos of Scarlett Johannson and Christina Aguilera, among others. How did he break into their email accounts? He guessed their email addresses and then reset the password by guessing the password reset questions. Like what is the name of the celebrity's pet, which he found on IMDb.
So the folks over at Gawker have compiled a handy-dandy list, "mainly from Wikipedia and gossip blogs," to find the answers to common password reset questions for famous folks. But they warn: "Do not use this to hack into anyone's email. Christopher Chaney is currently facing up to 60 years in prison for his crimes."