Stephen Colbert chatted with Paul McCartney and joined him on stage for a performance of "Hello, Goodbye" on the final broadcast of "The Late Show" on Thursday.
NEW YORK Stephen Colbert chatted with Paul McCartney and joined him on stage for a raucous performance of "Hello, Goodbye" on the final broadcast of CBS' "The Late Show" on Thursday night, a bittersw… [+6277 chars]