Gwen Renée Stefani ( born October 3, 1969) is an American singer, songwriter, and fashion designer. She is the co-founder and lead vocalist of the band No Doubt that experienced major success after their breakthrough studio album Tragic Kingdom (1995) along with several successful singles, including "Just a Girl", "Don't Speak", "Hey Baby", and "It's My Life". 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 met with both critical and commercial success. It spawned three commercially successful singles: "What You Waiting For?", "Rich Girl", and "Hollaback Girl", the latter reached number one on the Billboard Hot 100 while also becoming the first US download to sell one million copies. In 2006 Stefani released her second studio album The Sweet Escape. The album produced two successful singles: "Wind It Up" and the album's title track "The Sweet Escape". Her third solo album This Is What the Truth Feels Like was released in March 2016 and became her first solo number-one album on the Billboard 200.

During mid-1995, No Doubt and rock band Goo Goo Dolls went on tour opening for alternative rock band Bush. Stefani met Bush guitarist and lead singer Gavin Rossdale. They married on September 14, 2002, with a wedding in St Paul's, Covent Garden, London. A second wedding was held in Los Angeles two weeks later. According to Stefani, it was held so that she could wear her custom-designed wedding dress by John Galliano twice.

Stefani has three sons with Rossdale; Kingston James McGregor Rossdale born on May 26, 2006, Zuma Nesta Rock Rossdale born on August 21, 2008, and Apollo Bowie Flynn Rossdale born February 28, 2014. On August 3, 2015, Stefani filed for divorce from Rossdale, citing ""irreconcilable differences"".[108] Their divorce was finalized on April 8, 2016, to which Rossdale agreed to the ""unequal split"" of their assets. On November 4, 2015, Stefani and her The Voice co-star, country music artist Blake Shelton, announced that they were dating.