OK, since citoyen honourably admits Gewgling, Tony has it.
Not quite, though, but it'd be quibbling to argue against.
Art Garfunkel has a Masters in Math, and was studying for his PhD when he decided to become a full-time musician.
Philip Glass has a Bachelor's degree in Mathematics.
Carole King began a degree programme, but never completed.
So the answer to the actual question:
How do they add up?
is: Very well, actually.