David Letterman is throwing some subtle shade at his former network in the wake of its decision to cancel 'The Late Show With Stephen Colbert.'

David Letterman is subtly showing support for his successor Stephen Colbert after CBS' shock cancellation of "The Late Show."

From its 1993 inception with host David Letterman through its most recent decade under Stephen Colbert, CBS' The Late Show has hosted a who's who of musicians, both on the couch for interviews and on the stage for performances.