The shockwaves just keep on coming for the wildly popular singing series American Idol.

First, original judge Simon Cowell announced he would be leaving Idol at the end of last season - a move that seems certain to leave a palpable hole on the show, where Cowell was often known for his frank and constructive criticism.

Now Ellen DeGeneres, who in addition to appearing on Idol is also the host of her own daytime talk show, has confirmed she will be leaving the program as well.

While the comedian's departure will likely have less of an impact than the exit of music-biz veteran Cowell - DeGeneres all but alluded to her lack of musical-critiquing chops in her statement "this didn't feel like the right fit for me" - the prospect of another empty seat on the panel has sparked much speculation about what Idol will look like in seasons to come.

Among other potential changes that have yet to be confirmed: former executive producer (and current So You Think You Can Dance judge) Nigel Lythgoe is reportedly looking to return to Idol. Items appearing in the blogosphere today also suggest Kara DioGuardi has been let go from series. I'm not sure what any of this means long-term, but am fairly certain the show cannot survive if sole original judge Randy Jackson is left on his own to declare, "It was a little pitchy for me, dawg," week after week.

All this means that American Idol needs to hire replacements for Cowell and DeGeneres, and fast. Justin Timberlake, Steven Tyler, Elton John, Harry Connick, Jr., Jessica Simpson and Jennifer Lopez are just a few of the names that are presently being bandied about as potential new faces for the judges' table.

Over to you, readers: Who would you like to see take over for Simon and Ellen next season?