a popular singer的用法和样例：
- Her success as a popular singer was ephemeral.
- I should really love to become a popular singer.
- You will become a popular singer one day.
- The singer led off with a popular ballad.
- Jason: Well this babe is Petula Clark.She was a popular singer in the 60's and I was a member of her fan club.
- That new popular singer is a big draw.