IT has been a hard week for Justin Bieber. First the Canadian star was late for the first of several shows in London on March 5, then he nearly fainted (晕倒) on stage during the third show two days later. Bieber is currently on his Believe world tour, but fans were far from impressed when the singer made them wait for almost two hours on March 5. When he finally took the stage after 10 pm, some even booed (发出嘘声).