Gwen Renée Stefani (/stəˈfɑːni/; born October 3, 1969) is an American singer-songwriter, fashion designer, and actress. She is the co-founder of and lead vocalist for the rock band No Doubt. Stefani recorded Love. Angel. Music. Baby., her first solo album, in 2004. Inspired by music of the 1980s, the album was a success with sales of over seven million copies. The album's third single, "Hollaback Girl", was the first US digital download to sell one million copies. Stefani's second and final solo studio album, The Sweet Escape (2006), yielded "Wind It Up", "4 in the Morning", and the highest-selling single "The Sweet Escape". Including her work with No Doubt, Stefani has sold more than forty million albums worldwide.