"Teflon" Tim Urban didn't get his chance to sing one last time on the 'American Idol' stage following his elimination. But at least he was invited to perform on the 'Late Show' (weeknights, 11:35PM ET on CBS) and chat with David Letterman -- not your average, everyday occurrences.

Watch the video after the jump. "Teflon" Tim Urban didn't get his chance to sing one last time on the 'American Idol' stage following his elimination. But at least he was invited to perform on the 'Late Show' (weeknights, 11:35PM ET on CBS) and chat with David Letterman -- not your average, everyday occurrences.

"What are Ryan Seacrest's credentials?" Letterman asked him. Responded Urban: "He's got really good hair." Urban further explained how he was brought back to the show after being cut during Hollywood Week. Then he sang (and strummed) Elvis Presley's "Can't Help Falling in Love".