Reading the recent guitar solo thread brought this to mind. Many great solos seem to be the raison de être for the song. That is, the song appears to have been built around the solo (see Whipping Post, for example). Wondering about the "hidden" solos. Robert Quine and Richard Lloyd just wail throughout Matthew Sweet's "Girlfriend" but it's easy to miss behind the pure pop songs. Same with Fleetwood Mac's "Say You Will". Any others?