Question: When is the performer of song Yummy (Gwen Stefani Song) 's birthday?
Sentence (from "Gwen Stefani"): It spawned six singles, including "What You Waiting For?Rich GirlHollaback Girl", and "CoolHollaback Girl" reached number one on the "Billboard" Hot 100 chart while also becoming the first US download to sell one million copies.
Relevant evidence: No