This eclectic pop act stormed up the charts in 2002 with the slightly syrupy regulation ballad "Entra En Mi Vida" off their self-titled debut. But if that's all you know of Sin Bandera, take another listen. Songs like "Para Alcarzate" and "Sirena" prove they have songwriting chops to spare and aren't afraid to mix and match their influences. "Mientes Tan Bien" off of 2004's De Viaje hit No. 1 several weeks in a row, and this Argentinean-Mexican duo seems poised for a long career.