It's not "all of them" but,
If you want to portray an artist, it's important to know their work, not just the hits, but their entire body of work.
Know the artist's vocal intonations, different emotions, styles, and interests.
I think it was essential to learn at least 50 songs by heart to truly embody the role and deliver the performance he did.
1
u/Sandel494 2d ago
This morning it was 22 songs. Now 50...