I love the cover of Hem's album No Word From Tom. It's just such a great image (be sure to click on the image to see a much larger version). It's great because it really seems to make you want to ask questions like "Is that a photo or a painting?"; "Who is that girl?" (though it does look a bit like Sally Ellyson, the band's lead singer); "What is she doing on the bed?"; "What is her mood?" I don't know, I just think it's great and would love to get a large size version to hang on the wall.
Oh, and while I still haven't gotten around to buying the album, I'm sure the music is great too.