Geraldine Estelle Horner (née Halliwell; born 6 August 1972), is an English singer, songwriter, author, actress, and philanthropist. She rose to prominence in the 1990s as Ginger Spice, a member of the pop girl group the Spice Girls. With over 90 million records sold worldwide, the group became the best-selling female group of all time. The phrase "girl power", regularly uttered by all five members, was most closely associated with Halliwell. Her Union Jack dress from the 1997 Brit Awards also became an enduring symbol of girl power. In 1998, Halliwell left the Spice Girls to pursue a solo career but later returned to the group when they reunited in 2007.