After throwing up onstage at his concert in Arizona, Justin Bieber has taken to twitter to let his worried fans know that he is getting better

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After throwing up onstage at his concert in Arizona, Justin Bieber has taken to twitter to let his worried fans know that he is getting better.(Pic Courtesy: Getty Images)

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During his Believe tour Saturday night, the pop star became ill mid-show and left the stage twice.(Pic Courtesy: Getty Images)

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Despite the onstage incident, the 18-year-old heartthrob later tweeted that Glendale was a "great show" and said he was getting better before Sunday's show at Las Vegas, a magazine reported.(Pic Courtesy: Getty Images)

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Video from the concert shows the teen singer turning his back toward the audience during "Out of Town Girl," hunching over, puking and then running for the side of the stage.(Pic Courtesy: Getty Images)

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When he returned, he asked his adoring crowd, "Will you love me even though I'm throwing up on stage?" according to PopCrush.com.(Pic Courtesy: Getty Images)

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As for the cause of his illness, Bieber said he had a little too much milk before the performance, leading to upset stomach.(Pic Courtesy: Getty Images)

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