Your ability to recall words to songs accurately - is it like echolalia?  

I can recite entire movies verbatim, but I'd hardly call that a savant skill, most people have told me its annoying.  

I did know a girl in college who had a bizarre savant skill.  You could give her a date, and she'd tell you the day of the week, who she saw, and what they were wearing with great accuracy.  I don't know how far back she could go, at least a few months.