Cry Me A River: The 20 Most Heartbreaking Songs Of All Time! - Rock's Backpages: "For the last month Rock's Backpages has offered up a slew of sobworthy classics from all walks of pop. Country, soul, AOR, dance: you name the genre, we've scoured it for heartbreak greats. So get yer handkerchiefs ready... here's our tearjerking Top 20 , from the Everly Brothers to George Jones via Lorraine Ellison and Little Feat. --Barney Hoskyns, Rock's Backpages"
Thanks to Doc Quatermass for this link. For what it's worth, I absolutely agree with #1, a classic of the first water.