see Leslie Feist talk about her exploding career
Feist is big. See her talk about it with Jon Pareles on January 12th in NYC. Tickets are on sale. Many other 2008 "New York Times Arts and Leisure Week" are on sale too (the shows that disappeared after I posted them last time).
On December 12th (exactly one month earlier) - Feist performs "1234" ON THE TODAY SHOW. That's her arriving her for Letterman in the photo above.