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Grant Gustin Helps ‘The Glee Project’ Hopefuls Understand ‘Theatricality’
Grant Gustin played the devilish Warbler Sebastian last season on 'Glee,' setting his sights on Darren Criss' Blaine. He served as the guest mentor on tonight's (July 17) episode of 'The Glee Project,' which centered on theatricality, telling the hopefuls that the key to the concept is to sell it without overselling it.