Katy Perry to Hit the 'American Idol' Stage

Fred Duval, FilmMagicKaty Perry will grace the 'American Idol' live stage for tomorrow's (Thursday, April 21) elimination episode, joining the ranks of 'Idol' guest performers including 'Idol' alum Adam Lambert and pal Rihanna, who performed on last week's elimination show.Perry will perform her latest supernatural hit 'E.T.'. The track and sci-fi themed music video features rap superstar Kanye