Her name is Feist. I just got her 'The Reminder' album (honored at the Grammy's). Good, solid acoustic girl singer-songwriter stuff. With a banjo! Mostly recorded in France.
Perhaps the rest of the world is waking up to the fact that little of interest is getting signed in the US these days (there's good music, but few signings), and sees an opportunity to offer something a bit more interesting and quirky that Brittney, Kelly and Fergie!
If you like her, check out Regina Spektor, too. A refreshing change of pace and instrumentation...
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An arranger is just a tool. What matters is what you build with it..!