Watch! Darren Criss' Blaine Sings Christina Aguilera's "Fighter" in Glee Season 3, Episode 15: "Big Brother" (VIDEO) Share Tweet April 11, 2012 by Beth Douglass Related: Glee, Music, Darren Criss, Blaine, Season 3 Episode 15 Credit: Glee on Fox on YouTube Original airdate: Tuesday, April 10 at 8pm on Fox
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