Justin Bieber Concert?

Anyone whos been to Justin Bieber Concert please answer my questions :)
When does the concert start?
when do his opening acts go off stage?
does justin go soon after the opening acts?
what time does the concert actually end?
Please answer my question, i really NEED to know.
Thnx :)
How long is he on stage?
k Seriosly people if you dont know the answer go away and dont leave a comment, no offence i dont care what you think about him.

justin bieber concert