Once More With Feeling
Before I saw this, friends told me about it and I rolled my eyes 'til they nearly fell out. Then I watched it. I loved this episode, and while the premise, if unseen may sound a little cheesy, give it a chance. It's one of my favorite episodes. Be assured, the music doesn't make it a campy, filler episode. This is more than just some hokey lyrics and cheap synth pop. This is a fully orchestrated musical with well written lyrics charged with so much heart, pain and emotion. And the plot here is just as gripping as any Buffy episode, even more so than some of the random filler episodes.
I would love to see more of this written further to flesh it out more and presented on stage. This would be a great stage musical.
As three of my personal favorites, I would point out that "I'll Never Tell" a duet with Xander and Anya is fun and sweet. Later, it's contrasted by Giles's heartfelt "Standing" and then the beautifully written "Walk Through the Fire" sung by the full cast (good guys and bad guys) as one of the most charged numbers. It pumped me up for what I knew was going to be a great finale.