Justin Bieber kicked off his Believe tour over the weekend in Arizona. Bieber reportedly left the stage twice to vomit and even puked once on stage. He apologized and still managed to finish the concert. After the show Justin took to Twitter to let his fans know he was ok. Bieber tweeted, "Milk was a bad choice! Lol Great show. Getting better for tomorrow's show." To see the video of him throwing up, click here! In other news, we are giving Justin Bieber tickets away all week in the morning! He is coming this month to the BMO Harris Bradley Center...Listen to win!