Mo the caller wrote:
I think Artful C, like Freddy is learning songs to sing solo. Obviously quite different from learning to keep up with a choir rehearsal.

I've done a fair bit of singing in choirs and small vocal groups, too, where my part was usually harmony, so no, I wasn't just talking about reading music for solo singing. I don't see the two as "quite different" except that harmony parts may make less sense out of context—and when I'm solo singing, I'm usually transposing on the fly into a more suitable key (something already done for you in choral arrangements). That bit's really a doddle, though.