When Groban expressed annoyance that CBS appeared to have no money to pay for the rights for new songs, Corden explained that all of the network's cash goes to Jim Parsons of "The Big Bang Theory."
The segment climaxes in a choral arrangement of "This Old Man."
See the clip here:
Groban is a self-proclaimed theatre lover whose latest album, "Stages," is dedicated to musical theatre songs. He will make his Broadway debut next season in a revised version of Natasha, Pierre & The Great Comet of 1812.