First, Martha Stewart. Now, the key players on American Idol.

The Simpsons is going guest star crazy these days, announcing a Christmas-themed episode centered around the homemaking expert; and now a spring installment that will focus on the cast of TV's most popular show.

Ryan Seacrest, Randy Jackson, Simon Cowell, Kara DioGuardi and Ellen DeGeneres will all lend their voice to their Fox counterpart on May 23, when everyone's favorite, most bitter bartender, Moe Syzslak, joins the group on the Idol stage.

The episode will be titled “Judge Me Tender."

In 2004, Cowell made his debut on the sitcom when he portrayed an admissions screener at a Springfield school where Homer and Marge tried to send Maggie. He shot her down forcefully.

Meanwhile, as you get psyched for this special episode, remember to visit our section of The Simpsons quotes.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.