Justin Bieber left scores of teenage girls disappointed as he arrived into Heathrow Airport without greeting them. Bieber pulled his grey beanie hat over his head - obstructing his vision - and then walked the length of the terminal to his car between two minders without acknowledging his fans, who had been waiting for up to eight hours. The snub prompted one of the girls to shout out "Justin Diva" as his car pulled away, with the star in the back of the vehicle. Is Justin becoming a diva??