I knew who they were right away and was kind of excited to see that they "made it." Not sure what it will do for their careers, but I first saw them maybe two years ago on youtube, though I'm not sure exactly how I stumbled across them.
They have kind of a cute schtick where they show the music as it's being made, so if she's doing four vocal overlays, the screen shows her four times, plus his drumming, guitar playing, etc. She has a haunting voice and a very attractive "girl-next-door" look to her.
I like their video of My Favorite things