Britney Spears "Dont smoke weed yall"

Who needs D.A.R.E. when you've got Britney Spears?

4 songs in, Brit's lip synching show in Vancouver was shut down -- an announcement proclaiming excessive smoking made it "uncomfortable and unsafe for the performers" in the arena.

After 30 minutes, the air was deemed "clean" again and Spears continued -- but ended the show by shouting "Drive safe, don't smoke weed and rock out with your c**ks out! Peace mother f**kers!"

Words to live by.