Good research, you worked hard for your money! I can recommend the beautiful documentary about her mother that came out last year, where she features prominently along with her half-Swedish half-siblings!
Here's a nice little trick question I'm very proud of: Did you know that ABBA's Eurovision entry once lost out to Malta's? Do you know which year this occurred?
It was 1973. In the Swedish semifinal ABBA, then known only by their christian names, came 3rd with Ring Ring. The jury picked another Swedish group called Malta. Sweden came 5th that year. Ring Ring was a much better song and would have done better in the final.
Good work! Blancmange, Westlife and Sweet Dreams were what I was thinking about! Although technically, Honey Honey was not to difficult to top, since it wasn't released as a single in the UK, for reasons God and Epic records will never reveal.
I Have A Dream: Westlife Nr 1, ABBA Nr 2 The Day Before You Came: Blancmange 22, ABBA 32 Honey Honey: Sweet Dreams 10, ABBA -