Conversation so far:
How did Macy Gray start Macy Gray's musical career ?
Then a friend of mine asked me to be a singer in his jazz band.
What is the name of the friend who asked her to be part of his band ?
CANNOTANSWER.
Where did she meet her friend who asked her to be in his band ?
University of Southern California.
is there anything else interesting about her musical career ?
She then met writer-producer Joe Solo while working as a cashier in Beverly Hills.
Which projects did Joe Solo and Macy Gray work on together ?
Together, they wrote a collection of songs and recorded them in Solo's studio.
Name one of the songs Joe Solo and Macy Gray worked on together ?
Love Won't Wait.

Question: How did working with Joe Solo help Macy's musical career ?
Self-contained rewrite: How did working with Joe Solo help Macy Gray's musical career ?