Nicole Scherzinger: 'The Sing-Off' and 'X Factor'
Nicole Scherzinger, known for being the lead singer of the Pussycat Dolls, has been on several singing competition shows. She first started off as a judge on NBC's 'The Sing-Off' for two seasons. She then left to join FOX's 'The X Factor' in 2011 for one season. Now she is currently a judge on 'The X Factor UK.'—XFINITY Music Staff
(AP Photo/Michael Sohn)
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