You and me both, CT4 (re: Usher ~ Let it burn) Here are some others:

I told the Storm~ Gregg O'Quinn

One last Cry~ Brian McKnight

Any song by Sade' (just because it makes me think of my ex; we used to tell each other we loved each other every time we heard a song by her; I KNOW...corny, but I didn't think so at the time)

Nobody's supposed to be here~ Deborah Cox

I thought~ Brandy (off her full moon CD)

I wish I never met her (him in my case)~ Carl Thomas

truthfully ~ Brandy

Broken-Hearted~ Brandy f/ Wanya from BoyzIIMen

Separate ~ Avant f/ Kelly from Destiny's Child

I think that's it for now.