Justin Bieber's "Believe" album (Photo Credit - Facebook.com)

Justin Bieber vomited on stage during a concert in Arizona this past weekend. On Saturday night at the premiere of his "Believe" tour in Glendale, Justin was performing “Out of Town Girl,” when he first began vomiting on stage. In a video taken by a fan at the show, viewers can see Justin turn from the crowd right before he starts to throw up, then run off the stage.

The singer then ran back on stage apologizing to the crowd, saying “I’m sorry, I’m going to slow things down.” However, a few songs later before he performed “Beauty and the Beat,” Justin ran off stage again.

He eventually came back on stage and apologized to his audience, saying: 'Will you love me even though I’m throwing up on stage?' Obviously, his adoring fans didn’t mind, and Justin finished the show without any more issues.

Justin tweeted later that night thanking Glendale for a “great show”, joking that “…milk was bad choice.”

Justin Bieber Twitter (Photo Credit - Screenshot)

This was not the first time that Bieber has fallen ill while performing on stage; in 2011, Justin was forced to take several backstage breaks during a concert in the Philippines due to a chest infection.

Reach staff reporter Vanessa Wilkins here.