Avril Lavigne, Alanis Morissette, R. Kelly on 'The X Factor'

Slideshow posted in Photos | Monday, November 21, 2011

19 of 26: Josh Krajcik performs Etta James' 1961 song 'At Last' on 'The X Factor' pre-finale on Dec. 21, 2011 on FOX. ( Photo / Ray Mickshaw / FOX)

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