Simplify the following text for a Grade 3 native English-speaking person.
Original: Davis 's name became well-known to a younger audience when Kim Carnes 's song `` Bette Davis Eyes '' became a worldwide hit and the best-selling record of 1981 in the U.S. , where it stayed at number one on the music charts for more than two months .
Simplified: In 1981 Kim Carnes sang the hit song `` Bette Davis Eyes '' .