I don't know, so here's my top 5 (In No Particular order!)

# FFVIII - Liberi Fatali
# FFX-2 - 1000 Words
# FFVIII - Man With The Machine Gun
# FFVIII - Mods De Chocobo
# FFIX? - Melodies Of Life

Not sure if it's IX that it's from though :/