I found that this quiz takes just the first names on the ones I got right. I still did lousy, 6/13. I really expected to see Cher, Diana Ross, Dionne Warwick, Gladys Knight, Roberta Flack, Pat Benatar and Tina Turner. And an updated list would certainly have Adele on it. Oh well, thanks for the quiz!
So I thought I couldn't find the other ones, except Madonna. Great.