Emmylou Harris, Elvis Costello perform on "The Colbert Report"

(CBS News) Emmylou Harris, Elvis Costello and musician Don Fleming hit the stage Thursday on Comedy Central's "The Colbert Report."

Host Stephen Colbert even picked up a guitar and joined in on a rendition of the Huddie "Lead Belly" Ledbetter classic, "Goodnight Irene." They all traded verses on the American folk standard, including Colbert.

Watch it here: