Tina Fey paid a very funny farewell to David Letterman - which may or may not have involved her showing-off her spanx!

Comedian and actress Tina Fey joined David Letterman on US chat show the Late Show last night (April 7) and made sure her appearance was a memorable one for the host who is due to retire soon. 

It was the 20th appearance on the Late Show by Fey and she declared that this would be the last time she wears a fancy dress on late-night TV…watch the clip to see what happened next!