See below to catch ’1, 2, 3, 4′ as performed by Feist on last night’s taping of Letterman with some additional support from an indie all-star chorus featuring: Grizzly Bear, A.C. Newman (of The New Pornographers), Mates Of State, Broken Social Scene (including Kevin Drew), and various members of The National. Is Feist the new Polyphonic Spree?

MP3: Feist – 1, 2, 3, 4