Kevin Kristopik, the guy whose phone number Justin Bieber posted on his Twitter pretending it was his as payback for Kevin hacking into Justin's friend Ryan Butler's Twitter, is demanding that the popstar apologizes.
"I am sorry for meddling into your life," Kevin tells Justin. "But I think you owe me an apology, too."
Kevin also says that he has learned that "once you put something on the Internet, it is almost impossible to get it off." And Kevin's mom Kathy says that she thinks Justin's prank was too harsh. "Kevin was just hoping that Justin Bieber would text him back," she says.