Justin Biebers Believe tour kicked off with an onstage accident in Glendale, Ariz., when the singer got sick mid-song. Teen pop star Justin Bieber kicked off his Believe tour in Arizona by throwing up onstage. After Saturday nights show in Glendale, the 18-year-old heartthrob blamed it on drinking too much — too much milk, that is. Video obtained by TMZ from the concert shows Bieber turning his back toward the audience during Out of Town Girl, hunching over, puking and then running for the side of the stage. His dancers dont miss a beat, and even Biebers vocals continue on a backing track.