She left the stage after 4 songs because of too much smoking:

Lol, look how fast she is walking just to get out of there. o.o

LOL!!!! poor vancouver fans!!!

so unprofessional...

That's one way to send a message to the fans ...

At least her forehead is a normal one and she isnt dumb enough to go to the water with a microphone

Anyway, she is so amazing, poor Britney =/

now that was unnecessary, cause even Rihanna is owning her in performances, at least she tries to sing live. Well, I'm not saying anything about Pink, cause she's on another level.

I'm saying again, Britney stans should be able to take all objective criticism, cause she ain't got nothing on other artists.

http://www.youtube.com/watch?v=ATnlNNlF1UE

You been shut down bitch. If its affecting the performance a TRUE profesh stops until things are right.

U can suck ur booty with all due respect!

And i agree, unprofessional.

They could've just gave some girl a blonde wig and asked her to lip-sync and dance freestyle on stage while being surrounded by amazing dancers and the show would've been the same.

Ya'll are idiots.

If they just carried on half the dancers would leave the stage and go to the store for cookies and doritos. And the rest would start giggling at the pyrotechnics.

Yo faves would do the same.

You all just suck.

Britney > your Faves.

everything's clear with you. keep on dreaming.

I bet that "some girl" even more talented than Brit. i mean who isn't?

i'm NOT surprise at this video. at all. she's highly unprofessional.

They'll come up with any excuse when Brit obviously ****s up...they'll blame it on everything else but her this CLEARLY is unprofessional

professionalism? we are requiring too much from poor Britney! the chick has yet to learn how to sing.

Rihanna stopped a small concert when she realized that 2 guys in the audience were fighting... IKR? So unprofessional

would you want to be performing on stage and people's smoking drifting up and catching you in the face? Just because she smokes doesn't mean she wants to smell everybody else's smoke while she's trying to perform....

and by the way, this clip is from after she re-took the stage at the end of the show, not when she left the first time.

Exactly! You haters try to catch up to every little thing you can, ha?

Lol, I loved it when she told them not to smoke weed. Cute.

I'm pretty sure you included me in that list of haters, but what I was trying to do is to shush you Britney fans down when you were trying to hate on some artists, who are actually more talented than ur idol.

DEAD at Britney asking her fans not to smoke pot. Acting like a good role model??? Pathetic.