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Watch! Santana and the Troubletones’ Full Performance of Kelly Clarkson’s “What Doesn’t Kill You (Stronger)” in Season 3, Episode 14: “On My Way” (VIDEO)

Watch the performance before it airs! Santana (Naya Rivera), Mercedes (Amber Riley), and Brittany (Heather Morris) perform an exciting and powerful version Kelly Clarkson's "What Doesn't Kill You (Stronger)" in Glee's midseason finale, Season 3, Episode 14: “On My Way,”

Original airdate: Tuesday, February 21, 2012 at 8/7c on Fox