Justin Bieber tweets hacker's phone number

Canadian crooner Justin Bieber got his own back on a hacker who posted his phone number online by reciprocating. On Saturday night Bieber stuck up a tweet that read “Everyone call me... or text” appending a mobile phone number that wasn't his, but belonged a bloke called Kevin Kristopik, who apparently got hold of Bieber's number by breaking into the Twitter account of one of his chums. Bieber's only got some 4.5 million followers so Kristopik suddenly...