Persistent earworm alert CCXLVI

After listening to the year-end "American Top 40" countdown of 1981, it was inevitable that "Bette Davis Eyes" by Kim Carnes would lodge itself in my mind.  It was that year's biggest hit, which still puzzles me a bit.  I don't dislike it, but in a year with so much good pop music, it surprises me that "Bette Davis Eyes" sold better than any other song.  The vocals are rather raspy, and it doesn't strike me as a song that most listeners would seek out repeatedly.  It's lyrically and melodically memorable, though, so those must have been its keys to success that Summer.