YIKES! After FORMER pal Miley Cyrus DISSED him during an interview, Justin Bieber went BALLISTIC. Bieber apparently contacted Miley and told her to "keep her ****ing mouth shut!" Wow "He is mad," one insider tells NAUGHTY BUT NICE ROB. "He thought she was his friend. He is … [Read more...] about Miley Cyrus DISSED Justin Bieber and he went BALLISTIC