Josh Groban guest stars on episode three of Glee. He's seen here, backstage at a performance.
UPDATE: He'll also appear on the first season finale.
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<a href="http://www.tvfanatic.com/gallery/glee-guest-star/"><img alt="Glee-guest-star" src="http://images.tvfanatic.com/iu/t_full/v1371130857/glee-guest-star.png" /></a>
- Photo Credit:
Glee Season 1 Episode 3: "Acafellas"
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- Glee Photos, Glee Season 1 Episode 3 Photos
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- Matt Richenthal