Mariah Carey, Dolly Parton to Mentor Idol Hopefuls

Mariah Carey, Dolly Parton to Mentor Idol Hopefuls
Dara Kushner/INFGoff; Tony R. Phipps/WireImage

03/20/2008 AT 12:00 AM EDT

They've met their share of major female talent over the years -- Gwen Stefani and Jennifer Lopez dropped by last year -- and this year's crop of American Idol hopefuls will get another double dose of diva-dom this season. Mariah Carey and Dolly Parton have signed on to mentor the remaining contestants in coming weeks. While dates have yet to be announced for their appearances, look for these ladies throughout the spring. In addition, Neil Diamond and British composer Andrew Lloyd Webber (who wrote Phantom of the Opera, among other hit musicals) will meet and work with the contestants, too.

The way it works -- for the uninitiated -- is simple: Guest mentors spend quality time with the aspiring Idols, coaching them and leading them through their song choice. Clips of their work will surface on Tuesday's performance show. The following night, traditionally guest mentors will take the stage to perform live before one contestant gets the boot. Dara Kushner/INFGoff; Tony R. Phipps/WireImage

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