I scored 6. I'm older and didn't listen to pop or rock music much after the '70s - husband is a country fan and I now prefer classical - but I was able to remember Kesha from previous quizzes, and I got Minaj from the photo. Then I was able to score four more just by typing in the names that were already listed on the quiz. Sorry I missed McCartney, though.
Here's a fun Paul/MJ fact—Paul originally wrote the song "Girlfriend" for Michael to sing, but their schedules didn't line up to record or something so Paul sang it himself, which resulted in this hilarious recording.
Michael did his own version a year later on Off the Wall.
Michael did his own version a year later on Off the Wall.