There's another one from April '78 that doesn't go around, called I Really Love You, and it's bizarre. It sounds like his MIU voice on sleeping pills.
Hmm, I always thought "I Really Love You" was an unreleased Carl tune for some reason. So it's a Brian tune with a Brian lead? And you've really heard it? Kinda nuts. Is it a ballad? By the sleeping pills reference I'm assuming it's a slow one.
You're probably thinking of "I'll Always Love You", a Barry Mann song recorded during the
KTSA sessions, which features a Carl lead. Supposed to be really, really good.