Tegan and Sara began making music as teenagers, pairing their close harmonies with insightful lyrics and catchy melodies. Initially making music inspired by folk but with the edginess of punk, the twin sisters went from low-budget demos to recording albums for Neil Young's Vapor Records. With each album they made, starting with 2000's This Business of Art, they expanded their sound to include new wave and indie rock elements. 2004's So Jealous was the first album to feature '80s pop influences and sported their first definitive song, "Walking with a Ghost." After a couple more...