Conan O'Brien and Jack White Cover Eddie Cochran on 'Conan' Premiere

While hardly anyone knew what to expect from Conan O'Brien's comeback to late-night TV on Monday night, pretty much anyone familiar with Jack White could guess that his performance on the premiere episode of 'Conan' wouldn't be business as usual.

Still, it was somewhat of a surprise when, during the final stretch of the show, the host and Jimmy Vivino and the Basic Cable Band joined White to perform a version of Eddie Cochran's 1956 song, 'Twenty Flight Rock.' White and O'Brien previously teamed up over the summer to record the cover for 'Conan O'Brien Live at Third Man,' which was tracked at White's Nashville studio.

As Team Coco supporters reveled in the memorable duet, O'Brien continued the show by doing a short interview with White where the two talked about how they met and what it was like recording their album. And after O'Brien explained that recording with White was the "highlight certainly of the tour and my life," the Dead Weather member showed off his own funny bone by informing O'Brien that he changed the security code after the host's stay in Nashville.