It was announced on #American Idol last night that a bunch of guests would be visiting the show this season. Most notably, Gwen Stefani, Jennifer Lopez and Diana Ross. Other's include: Jon Bon Jovi, Martina McBride, Barry Gibb and '60s stars Lulu and Peter Noone from Herman's Hermits. It's good that the show is trying to mix #things up this season, but it was unclear if the guests will appear as

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