Avril Lavigne “American Idol” Audition Guest Judge

Avril Lavigne is about to make things real complicated for some American Idol hopefuls. The pop punkstress will join Simon, Randy, and Kara at the judges’ table for one day when Idol arrives in Los Angeles for the final two days of auditions later this week.

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Victoria Beckham, Mary J. Blige, Neil Patrick Harris, Shania Twain, Kristin Chenoweth, and Joe Jonas have also filled-in as guest judges on American Idol this summer, following the impromptu departure of longtime judge Paula Abdul last month.

The ninth season of American Idol premieres on FOX in January 2010.