According to Access Hollywood, Jennifer Lopez is scheduled to perform on American Idol April 11 during the Top 8 results show.
Access has also heard “very strong rumors” that Gwen Stefani will perform on March 28th, during the Top 10 results show.
Let’s see if Gwen, and Jennifer in particular (who is reportedly a diva), will be working with the kids as well. Nigel Lythgoe has come out on several occasions to say he will not book a guest who refuses to work with the contestants.