Mercedes (Amber Riley), Santana (Naya Rivera) and Brittany (Heather Morris) make trouble for New Directions as the Troubletones. Blaine (Darren Criss) kills another Katy Perry cover. Puck woos Shelby with a guitar and Damian McGinty (Rory) closes his debut episode with a (sweet-sounding) bang.
Watch all the performances from Glee Season 3, Episode 4: “Pot O’ Gold.”
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