"I'm Not in Love" is what I was referring to, yes! "Une Nuit au Paris" is absolutely excellent too, though. I think I actually notice a dip in quality more in the second half of "The Original Soundtrack" than I do on "Sheet Music", but both those albums are very worth having. And I like the debut a fair bit, I guess the other two I've heard just felt more polished or something. I don't exactly consider myself a hardcore fan of 10cc or anything like that, but they definitely have a fair bit of material I like having around.