Through a post on The Gulf Stream I found out that singer José González started his PhD in Biochemistry before switching to a full-time music career.
González does the music for this overall amazing Sony advertisement:
I found this interview about his previous work in science, and why he left the lab for music. Time was the main concern. When music became a full time job, he could no longer do science as well.
“I miss Biochemistry, but I still feel that there is a lot I can do with music” – José González