Conversation so far:
What was You Light Up My Life?
You Light Up My Life is a ballad written by Joseph Joe Brooks. The best-known version of the song is a cover by Debby Boone.
Did You Light Up My Life by Debby Boone make it to the top of the charts?
It became the biggest single of the 1970s in the United States, setting a new Billboard Hot 100 record for most weeks spent at Number One.
What did Debby Boone do after the success of You Light Up My Life?
Boone's wholesome persona contrasted with the image-conscious pop-music industry, leading her career in different musical directions. Boone began to focus on country music.

Question: What was her greatest accomplishment?
Self-contained rewrite: What was Debby Boone's greatest accomplishment?