music: 60's Chart Toppers: Name The Artist: Holy Cow?

Questions

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?

"I never had the least notion that I could fall with so much devotion..."?

"Shake your thang, like a boomerang..."?

"Without your love, it's a honky tonk parade..."?