Three albums into their career, Canadian guitar-pop duo Tegan And Sara remain fairly enigmatic and culty, recognized primarily as blank-faced twin sisters infatuated with the urban muscle and new-wave sparkle of bands like Missing Persons and The Pretenders. The DVD It's Not Fun. Don't Do It! fleshes out Tegan And Sara's personality considerably, via a full set of their charmingly lo-fi videos, a tour documentary that catches their playful side, and a revealing making-of feature which shows them having philosophical arguments over what songs on So Jealous, their breakthrough third album, should sound like.