These two are tied for my favorite song from this game.
I remember playing these levels and pausing the game just to hear them.

I was so mad when Mining Melancholy was the only song NOT on the OST. Seriously?

And I love how in the roller coaster levels when you die it doesn't cut to the death music. it stays funky.
I've not actually played We Love Katamari, but I have played the first one and this song is by the same guy who does The Moon and the Prince, which is my favorite track from the first game.
(And the name is amazing.

)
I agree with a lot of you that the first three Sonic games had awesome soundtracks.
The soundtracks to those games are about the only 8-bit stuff I can listen to without getting a headache.
