We're blown away by this rendition of "How Will I Know," one of Whitney Houston's all-time classic. Watch the performance now.
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Blaine leads the way on this rendition of "You Should Be Dancing." Watch him and his fellow Glee stars take a trip back to the 70s now.
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Glee takes us back to the 1970s in this performance clip. Watch Mercedes lead the way on "Disco Inferno."
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Matt Bomer and Darren Criss team up here for a duet on "Somebody That I Used To Know." The former guest stars on the Glee episode "Big Brother."
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Ready to go behind the scenes, Gleeks? This video features interviews with Matt Bomer about his guest appearance on "Big Brother," along with a clip of him singing.
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Ricky Martin leads the New Directions in this performance of LMFAO's "I'm Sexy and I Know It." Watch and enjoy!
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Darren Criss leads this amazing cover of "Wanna Be Startin Something." It's just one of many Michael Jackson covers from the aptly titled episode "Michael."
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Naya Rivera takes the reigns here on "Santa Baby." This scene was actually cut from the Glee Christmas special.
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Glee Quotes

Rachel: This is what I wanted!
Sam: No, what you wanted was a second chance to get it right and Carmen just gave it to you. If you throw all that away you're going to be making the same mistake all over again

I'm gonna miss all of you. I love you guys.

Puck