There is an episode in which Ricky sings to lucy a song I think it's called Heaven. Does anyone know who sings it and if it's called Heaven.

Hi!
Actually, I think the song you are refering
to is called dancing cheek to cheek and he sang it to her in the episode,Pregnant women are unpredictable,one of my many favorites.
I'm not sure who sang it besides Desi,sorry.
I just loved all the mood swings she went through in that episode. Poor Ricky didn't
know what to do!