Geri Halliwell countries, becoming the best-selling single by an all-female group of all time. It was followed by nine further number-one singles from their albums "Spice", "Spiceworld", and "Forever". Each member of the group received a nickname from the media. Halliwell was named "Ginger Spice". Other successful releases followed, including "Say You'll Be There" and "2 Become 1" from "Spice", and "Spice Up Your Life", "Too Much", and "Viva Forever" from "Spiceworld". On 31 May 1998, Halliwell announced that she had left the Spice Girls due to depression and differences between the group. The first official confirmation was an announcement to the
2 Become 1 the song a "perfect adult contemporary confection". Greg Kot of the "Chicago Tribune" said that their first album "is a compendium of slick secondhand urban pop encompassing [...] G-funk synths on 'Say You'll Be There' [...] and Babyface's guitar and strings balladry on '2 Become 1'". In a review of the group's 2007 compilation album "Greatest Hits", Talia Kraines of BBC Music called it "shimmering" adding that "only a cold heart could fail to love their first festive #1". Digital Spy's Nick Levine said that the group's slower songs were "probably their strongest suit", and thought that "'2 Become 1'