"Hollaback Girl" is a song by American singer-songwriter Gwen Stefani from her debut solo studio album, Love. Angel. Music. Baby. (2004). It is a hip-hop song that draws influence from 1980s hip-hop and dance music. The song was written by Stefani, Pharrell Williams, and Chad Hugo, with the latter two handling production as the Neptunes. The song was released as the album's third single on March 22, 2005, and was one of the year's most popular songs, peaking inside the top 10 of the majority of the charts it entered. It reached number one in Australia and the United States, where it became the first digital download to sell one million copies.