They're Canadian. They are identical twin sisters. They are both lesbians (not with eachother, you sicko Milton Twins fan). They have always refused big record labels and have never had an album go gold or platinum. Their music genres listed on their wikipedia page are "Indie rock, new wave, indie pop, indie folk, synthpop", and frankly those kind of describe them pretty accurately. Yep, they've hit so many of the buttons on how you get NPR's "All Songs Considered" airplay.
But wait! There's more! They're really good! I don't even know how I found them, I think it was KRUI back in the early 2000s when I was in school. Then the band went dark for a while until I heard they were releasing an album in 2007. I thought, hey, I'll give it a try. It was awesome, still a favorite. I listened to this entire album (The Con) again last night, and now because we need to put up new Hamsterdams so quickly I thought I'd just give you something that was top of mind. I present to you Tegan and Sara:
Tegan And Sara - The Con (Video) (via Warner Bros Records)