I rarely watch Jimmy Fallon, but I couldn't resist when I saw the promos for the show a day or two ago. Fallon was all googly about having McCartney on the show. You could just see it in his eyes, he was like every 15 yr. old kid that got a ticket to a Beatles concert back in the 60's.
So check out this video of Sir Paul and Jimmy singing Scrambled Eggs - you'll recognize the tune as soon as they start. According to Paul this is how he remembered the melody to this song that we all know by another name.