Despite the unmistakably Latin sound of Copia Doble Systema, they actually hail from Denmark! Founded a few short years ago by DJ Copyflex, they achieved rapid international popularity; even collaborating with labels like Mad Decent. This newie is released via Urban World and it's an infectious, almost salsa, sing-along based around a shuffly mambo loop. There's three further mixes of it, the best being Joelito's slowed and stripped down version. "Boom Boom" is more of the harder edged digital cumbia that they've become known for; with a female MC, piano and synth riffs and a pounding, distorted electronic kick throughout. It's also is remixed in a killer reggaeton style by Thornato.