A short time later, an announcer declared: "It's become uncomfortable and unsafe for the performers. The show will resume as soon as the air around the stage is clear. The performance will not proceed until the air clears."
She then spoke to the crowd for the first time: "What's up, Vancouver?"
After closing the show with "Womanizer," Spears advised the crowd, "Vancouver, don't smoke weed."
"We want to apologize to all the fans who attended our Vancouver show tonight for the brief pause in Britney's set," read a statement on Spears' official website. "Crew members above the stage became ill due to a ventilation issue."