Letterman has a long relationship with Grohl and the Foos. This is not a surprise to me. "Everlong" has special meaning for him.

THANK YOU for sticking up for them! They were so good live! I saw them twice in one weekend. Fun, funny, and with some variety. They have so many songs… Great songs. So I don't like "Monkey Wrench"— I love "Stacked Actors."