The girl-power-charged fivesome known as Spice Girls were a wellspring of instantly memorable tracks. They rocketed to pop ubiquity with their mission-statement first single, “Wannabe”, and went on to rule the late '90s with glittery hits that combined big beats, smooth vocal harmonies and bags of confidence. From the slinky funk of “Say You'll Be There” to the globe-spanning romp of “Spice Up Your Life” to their sparkling farewell track, “Goodbye”, the Spice Girls' catalogue is brimming with tracks that epitomised the kind of turn-of-the-millennium optimism you could dance to.