The man who hacked Selena Gomezs Facebook page has been jailed for a year.Fast food worker Gareth Crosskey gained access to the Disney stars profile in January 2011 by posing as Gomezs stepfather Brian Teefey, who administrates the page, and persuading Facebook bosses to reset her password.Crosskey is alleged to have threatened Teefey with releasing several personal messages between Gomez and Bieber, who at the time had not confirmed their relationship.He was tracked down after a £50,000 joint investigation between the Metropolitan Polices e-crime unit and the FBI.