Brooklyn's Grizzly Bear floors everyone who hears them. They open for The New Pornographers this week at the Calvin. New song premiered on Letterman.

The New Pornographers would carry this bill without blinking but the opportunity to see Grizzly Bear, a band with a Hampshire College alum, three heart-stopping shows in Northampton, and handpicked by Radiohead to open for their "In Rainbows" tour, is a treat.