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13 memorable 'Glee' guest stars

13 memorable 'Glee' guest stars

"Glee" definitely packed in the star power during its six seasons of musical melodrama.

Since the Fox series raised its curtain in 2009, full episodes have been devoted to the repertoires of Michael Jackson, Fleetwood Mac, Lady Gaga and Madonna, among others. On one occasion, a recording artist who was being spotlighted made an appearance on the tribute episode (we're looking at you, Britney Spears). But often, the pithy guest stars outshone the performances and doled out some memorable moments of their own.

As we say goodbye to McKinley High School (and the series' awkward post-graduation story lines as well) on Friday night, here's a look back at some notable...

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