Even Celine Dion's "My Heart Will Go On" could be made into Eurobeat disco. That should be plenty fast, no?
But for "normal" fast-paced love songs, I say Joan Jett and the Black Hearts - I Hate My Self For Loving You, or "Every Thing About You" by Ugly Kid Joe. Not your typical love song, but something cool to play during a wedding!
depends on your definition of fast.
if you want really really fast, dragonforce. but its not to the liking of some.
Not so fast, I dunno, dream theater?:dunno: ( I love their music btw )