August 6, 2009 "Idol" keeping 4-judge panel; Katy Perry, Posh Spice, others will fill in for Paula Mostly female pop stars will take over for Paula Abdul when "Idol" auditions begin filming tomorrow in Denver. "Our intention is to have guest judges be female pop stars, female performers, female artists, and between now and January we will come up with a permanent solution on what we will do…and a replacement for Paula," said Fox entertainment boss Peter Rice. Reportedly, Victoria Beckham is bei