Late Show with David Letterman band leader and sidekick Paul Shaffer is to be interviewed about his new memoir on the U.S. chat show, CBS said. Shaffer, 59, is to take the guest chair on Tuesday's edition of Late Show.

David Letterman had a good excuse for missing work: He girlfriend was in labor with their first child. Bandleader Paul Shaffer filled in for Letterman as host Monday.