Britney Spears walked off stage during a recent concert because the arena was too smoky.
The singer, who is a smoker herself, performed three songs in Vancouver on her Circus tour before leaving the stage.
A voice came over the speaker system informing the audience the show would not restart if people continued to smoke marijuana and cigarettes because if was unsafe for the performers and Britney.
Around 40 minutes later the star returned to the stage but, according to a witness, put on a half-hearted effort.
After the encore, the 27-year-old spoke to the audience and said: “Thanks Vancouver. You were wonderful. Drive safe. Don’t smoke weed.” and “Rock out with your cocks out! Peace, motherfuckers!
Following the concert, a spokesperson for the singer apologised to fans and put the problem down to “ventilation”.
“We want to apologise to all the fans who attended our Vancouver show tonight for the brief pause in Britney’s set,” they told Perezhilton.com
“Crew members above the stage became ill due to a ventilation issue.”