1. T.O.K., "Couple Up"

    August 20, 2009 12:50 PM EDT T.O.K. isn't exactly Jamaica's hardest hitting act -- when it debuted in the '90s, the foursome was dubbed reggae/dancehall's "first boy band." Yet "Couple Up," the lead single from third LP "Our World," is light and breezy even by the now…