The theme of Once More With Feeling is the characters being forced to express something they are hiding from the others through song. It is really quite brilliant. Some of Whedon's best work, in my humble opinion.
The songs range in style from rock opera to 50's sitcom theme and are accompanied by some pretty brilliant dance numbers as well. So, without further ado, here are my favorite songs from Once More With Feeling.
My number one is Giles singing this (unheard) to Buffy. Anthony Stewart Head is so flipping talented.
My second favorite is Anya and Xander in all their adorableness.
And of course, I couldn't forget my favorite person ever, in the whole world. (he literally makes my knees weak *sigh*)
Yup, lots of awesomeness of behalf of Joss and the cast went into this.