Tegan and Sara
These twin sisters from Calgary worked the jittery end of the coffeehouse throughout their twenties, crafting a sharp folk-rock sound that was a touch emo, but still Canadian-modest. But now, at 32, the Quins have decided to get sweaty. Their seventh album is a veritable bouncy castle of lush, up-to-the-minute indie synth-pop and blown-out radio choruses, less fussy and more whee than anything they've done. Producer Greg Kurstin (Ke$ha, Kelly Clarkson, etc.) surely deserves some thanks for the dance-floor churn. But the duo draw you as close as ever with their bittersweet silk-over-sass harmonies. Emotional processing should always be so liberating.