Melanie Chisholm's raspy, powerful voice gave the Spice Girls' fizzy pop a megadose of girl power. In 1998 she began moving beyond her Sporty Spice persona when she dueted with Bryan Adams on the laidback “When You're Gone”; her first solo album came out the following year, and it put her voice's best qualities on full display. Her unmistakable alto brings vulnerability and grit to even the brightest dance pop songs, and her unbreakable persona has inspired listeners around the world.