Rachel, Santana, Kurt and Sarah Jessica Parker's Isabelle sing "At the Ballet" from A Chorus Line in Glee Season 4, Episode 20: "Lights Out."
04.27.2013 / 02:00 AM EDT by Beth Douglass
Related: Glee, Music, Rachel Berry, Santana Lopez
Watch: Glee’s “At the Ballet” Rachel, Santana and Sarah Jessic ...
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