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

Josh Krajcik (L) and Alanis Morissette perform her 1998 song 'Uninvited' on 'The X Factor' on Dec. 21, 2011 on FOX.  <span class=meta>(Ray Mickshaw / FOX)</span>
November 21, 2011 12:00:00 AM PST