The challenge of not producing clones.
Some one-hit wonders stand the test of time, too, says John Legend.
Nina Simone knew what greatness sounded like, John Legend says.
There are many ways to define greatness, John Legend says, but there has to be attention to quality.
John Legend says he didn't want to sound like everyone else, but he wasn't surprised at his success.
It's what Legend was working on the entire time.
Legend got his start playing piano for Lauryn Hill.
It's about making people fall in love again, says Legend.
Trying to find the good in religion.
Legend talks about screwing up the courage to leave a corporate job to pursue music.