US TV
Rex Features
The star developed the advert for the Late Show with David Letterman during the Super Bowl coverage, which became the most-watched programme ever on Sunday.
Speaking on his penultimate edition of The Jay Leno Show, he said: "It was Dave's idea. And when he told me - no matter what animosity there is, among comedians, a good joke is a good joke. It makes all [the hostility] go away.
"I wanna thank Dave. I was glad to promote his show."
> Leno 'wore disguise to Letterman ad filming'
Tube Talk
'Freaks and Geeks': Tube Talk GoldTube Talk Gold heads back to the '80s and remembers Freaks and Geeks.
2012-13 Season
John Stamos to star in 'Little Brother'The former Full House actor will star in the comedy pilot Little Brother.
US TV Interviews
'Celebrity Apprentice' Debbie Gibson Q&ADebbie Gibson opens up about her Celebrity Apprentice experience.
US TV Ratings
'Vampire Diaries' soars to 3m for The CWThe Vampire Diaries and The Secret Circle perform well for The CW.
