Between the long reign of ABBA and the short rule of the Spice Girls lies the land where Ace of Base governed. This Swedish pop act ruled the global charts during the early 1990s when their debut album The Sign spawned a slew of Top-10 singles, including the title track. Their subsequent releases haven't been able to duplicate their initial success -- probably because of the glut of American boy bands and junior divas that have risen in their wake.