Gwen Renée Stefani Shelton is an American singer-songwriter and fashion designer. Stefani rose to fame as a member and lead vocalist of the band No Doubt, whose hit singles include "Just a Girl", "Spiderwebs", and "Don't Speak" from their studio album Tragic Kingdom (1995), as well as "Hey Baby" and "It's My Life" from later albums. During the band's hiatus, Stefani embarked on a solo pop career in 2004 by releasing her debut studio album Love. Angel. Music. Baby. Inspired by pop music from the 1980s, the album was a critical and commercial success. It spawned six singles, including "What You Waiting For?", "Rich Girl", "Hollaback Girl", and "Cool". "Hollaback Girl" reached number one on the Billboard Hot 100 chart while also becoming the first US download to sell one million copies.