Conversation so far:
When did Solange Knowles start performing?
Managed by her father, Solange Knowles first ventured into the music business in 2001 as the lead singer on the title theme song for the television series The Proud Family.
What was Solange Knowles the lead singer of?
Solange Knowles was the lead singer, backed by Destiny's Child, on the title theme song for the animated television series The Proud Family
What was Solange Knowles' first recording?
At the age of 14, Solange Knowles started working on her debut album Solo Star.

Question: What is Solo Star?
Self-contained rewrite: What is Solo Star?