My sister has been nagging me for ages to try and find a song on Fullmetal Alchemist for her. This is the details she has given me:

It's on Episode 47 (or maby another episode) when Dante imaples Lust on the wall with 3 spikes and sends Hoenhime(sp?) to the gate with rose's baby.
Whats the music playing in the background called? anyone know.

AH~ You can find it on Gendou Anime music! =D
You can download every FMA song from the soundtrack there
:D
Also- you can even download the songs where Ed's, Roy's, Winry's, Al's, Hughes, and many more sing in japanese voices!