She didn`t leave the stage at the middle of the song
8:17 p.m: The lights dim. It’s dark except for the glow of cell phones. Everyone screams. A red lifts off the circular main stage. A video of blogger Perez Hilton introduces Britney on-screen.
When the pop diva appears on-stage minutes later, dressed as a ringleader, holding a whip, her fans can scarcely contain their screams.
They manage to get even louder when she removes her jacket, revealing a sparkling bra and bare midriff. Britney’s midriff!
8:36: Stage has been dark again for a few minutes. The impatient-for-Brit crowd chants: “Britney. Britney. Britney.” There’s even a few boos and some howls. Are they in pain?
People want more Britney. But the gal’s got to change doesn’t she? Tsk.
8:44: Still nothing on-stage. Just darkness. “Britney. Britney. Britney.” This doesn’t usually happen until an encore.
8:45: Still nothing. And then a voice comes over the loud-speaker with an announcement about smoking in GM Place.
“It’s become uncomfortable and unsafe for the performers, including Ms. Spears,” the voice says, eliciting big boos from the crowd. “The show will resume as soon as the air around the stage is clear.”
Is this for real?
It is.
“The performance will not proceed until the air clears."
8:51: I receive a text from a friend at the concert, seated closer to the stage than I am.
“Seriously? Is this a stall?”
Well, we’re still looking at a blackened stage. Still waiting for the air to clear?
People are chanting her name. Others are just yelling and howling. The mood is sour. I'd hate to be a smoker right about now.
8:59: The entire stadium is doing the wave in the darkness, their movements lit by their mobile phones. It's deafening.
9:03: “We want Britney.” Clap. Clap. Clap. Clap. Clap. “We want Britney.” The organ is playing. This is like a hockey game without any players.
9:05: She’s back. The blonde hair reappears on-stage, dressed in a sparkling silver dress singing the song, Ooh Ooh Baby.
http://www.vancouversun.com/Entertai...325/story.html
PS: Apparently after radar,when she went to change her oufit at 9:36 she didn`t return on time,and the announcemnt of the smoking came on,but she returns at 9:05 on stage,so chill out.
are you serious!? 
