Mr. Men nail polish/Somethin' Stupid (from The Simpsons)

Cast

 * Don't Worry, Be Mr. Happy as Sideshow Bob
 * Walking on Little Miss Sunshine as Selma Bouvier

Lyrics
Don't Worry, Be Mr. Happy: I know I stand in line, until you think you have the time to spend an evening with me.

Walking on Little Miss Sunshine: And if we go some place to dance, I know that there's a chance you won't be leaving with me.

Don't Worry, Be Mr. Happy: And afterwards we drop into a quiet little place and have a drink or two.

Don't Worry, Be Mr. Happy and Walking on Little Miss Sunshine : And then I go and spoil it all, by saying something stupid like: "I love you."