'Glee' Exclusive: Watch the cast cover Avril Lavigne's 'Keep Holding On'

Next week's episode of Glee, directed by co-creator Ryan Murphy, is chock full of fantastic performances, including Mercedes covering Jill Scott's "Hate on Me" and a Rachel/Finn version of Jordin Sparks and Chris Brown's "No Air." But probably the most dramatic moment is the climactic glee club performance of Avril Lavigne's "Keep Holding On." I don't want to spoil the episode for you Gleeks out there, but it proves to be a pivotal song for now-pregnant Quinn. I was actually fortunate enough to be on set for this episode back in April and I'm thrilled that I can now watch (and download) the final version. Glee just keeps getting better.

What do you think of the "Keep Holding On" cover, Music Mix-ers? Is this the next big Glee hit? What songs would you like to hear in upcoming episodes?

More from EW's Music Mix:

Glee's version of 'Somebody to Love': Awe-capella!

'Glee' soundtrack announced: See it here!

'Glee' propels Journey's "Don't Stop Believin'" to go on and on and on and on