I have the impression that Mariah put no vocal effort at all on "How Much" and "X-Girlfriend" (from "Rainbow"). She has pretty much one of the best voices of all time so I don't get why. Can you think of other songs by her that let you down vocally?

Those bonus tracks from Charmbracelet where she does whispery falsetto throughout the entire song But I guess it compliments the lyrics better in some cases rather belting it out and ruining the vibe.