'Colbert Report' Ends with Big 'We'll Meet Again' Celebrity Sing-Along Send-Off [Video]

The Colbert Report prepared the send-off for host Stephen Colbert with a big bang. Celebrities, musicians, friends and past guests all came over for the final episode of the show.

Colbert is set to replace David Letterman on the Late Show next year. Before he goes off to his new gig, he said goodbye to the Colbert Report, which has been on the air for nine years.