J.LO, GWEN STEFANI TO ROCK 'AMERICAN IDOL'

'American Idol' is turning up the star power this season.The top-rated talent show announced Thursday that , , , , and would be among stars to appear. Sixties' stars Lulu and Peter Noone of Herman's Hermits will guest on British Invasion Night. According to 'Access Hollywood,' J.Lo has been tapped for the April 11 episode, and Gwen Stefani will pop in on March 28.