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

It takes years to build a good reputation, and only seconds to destroy it.

Will

Getting a thumbs up from him is like getting a thumbs up from Joan and Melissa Rivers.

Tina