'Idol' Judges Simon, Paula and Randy Reunite for Kelly Clarkson's Walk of Fame Star - TMZ

"American Idol" trio Simon Cowell, Paula Abdul and Randy Jackson are putting the band back together -- at least for today, all in the name of supporting Kelly Clarkson and her new star on the Hollywood Wall of Fame.

You'll recall, Kelly Clarkson was on the very first season of "American Idol" in 2002 and ended up winning the whole thing, which led to her record deal with RCA.