Misc: A fun, new winter sport?

Questions

This tune from "Deliverance" was written by Eric Weissberg & Steve Mandel.?

This was the last Beatles album recorded?

This woman had the unfortunate luck to sing with Paul Anka on "Having My Baby"?

Those big black cd's that you see at garage sales that people call "albums" are made of _____?

Though they had 9 #1s in the UK, Abba's only #1 was this?