americanidolposhpremiere.jpgCR: Michael Becker/FOX

Idol is back and bigger than ever! Tuesday's premiere is gonna be mayjah, with Posh sitting in as a guest judge during the Boston auditions.

Victoria has said she had a blast stepping into the judge's shoes (must be nice to judge someone else for a while) and didn't mind dishing it out to Simon.

Other celebrity judges this season include Joe Jonas, Katy Perry, Mary J. Blige, Shania Twain and Avril Lavigne.