Some songs have lovely, long languid outros in which the vocal's echo on for an age, in this sort of Ahhhhhhhhhhhh way, and I really like good songs that do this, so here our a few of my favourites...why not?
Simon and Garfunkel - The Only Living Boy in New York: possibly the best example, with the whole song fairly "ahhhhh" throughout, and then really driving it through until the end. Good old Garfunkel and Simon. Starts at 2:50 odd.
Sufjan Stevens - Chicago: I find Sufjan a bit tiresome, so twee and whimsical, but you can't deny (well, you can if you want) the lovely ahhhhhhness of the ending to this song, complete with twinkly piano notes. Starts at five minutes dead.
The Flight of the Conchords - Ladies of the World: Comedy song, yes, but musically excellent and a nice ahhhh moment which comes back into the song unexpectedly, catching you off guard and giving you a nice, bonus ahhhhhhh. Ah, that's nice. Starts around three minutes.
Any suggestions? Know I'm missing some but these were the ones that I could recall with relative ease...