Lynch will talk to contestants about fearlessness July 17, while Riley will discuss determination on the July 31 edition of the show.
Criss will appear on the Aug. 7 episode, while Colfer will drop by Aug. 21.
Now in its second season, "The Glee Project" is a reality series in which aspiring actors and singers compete for a recurring role on the music-themed dramedy "Glee."
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