First Listen! Blaine and The Warblers Sing Kelly Clarkson's "My Dark Side" in Glee Season 4, Episode 7: “Dynamic Duets" (VIDEO) Share Tweet November 19, 2012 at 12:11PM EST by Beth Douglass Related: Glee, Music, Blaine, Season 4 Episode 7 Credit: OnMusicGlee on YouTube Blaine (Darren Criss) is back to visit the Warblers... and they're bringing out his dark side! Blaine and his old show choir sing Kelly Clarkson's "My Dark Side" in Glee Season 4, Episode 7: “Dynamic Duets.” Gulp. Can’t get enough Gleetastic goodness? Like us on Facebook or follow us on Twitter!