Lindsay Lohan, 25, will guest-star on Glee, FOX's hit high school singing show, according to An inside source told the web site that Lohan will appear on one of the final episodes of this season as herself, most likely as a celebrity judge for the final sing-off. (Past judges have included music legends Josh Groban and Olivia Newton-John.)

News of Lohan's Glee spot comes after her highly watched Saturday Night Live hosting gig attracted a huge amount of viewers, though the reviews were less than kind. If Lohan shines on the scripted Glee (it's her first TV job since a 2008 arc on Ugly Betty), then her comeback will seem much more decisive.

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