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Updated: Thu, 27 Feb 2014 20:00:00 GMT | By Colleen Last
Justin Bieber turns 20: his highs and lows

Justin Bieber

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In March 2013, we got the first hint that Justin was transforming from boy next door to bad boy, after he turned up two hours late to a concert in London. Many of his teen fans had already left and the star was booed by the audience for leaving young fans waiting on a school night.