"This record, Heartthrob, is our most pop sounding record," Tegan told Fresh 102.7/New York during the duo's performance at City Winery. "But I think that we've been on a musical evolution since we started back in the '90s."

The gradual transition in their music writing style has been natural to the sisters and supported by fans, from the guitar dominated This Business of Art to their popular fifth studio release The Con. Despite the eclectic sound they have produced over the years, which Tegan describes as not having a "place in a record store," there has been one common characteristic binding their catalog.