The point of them is to get stuck in our head but some of them do a better job then others. I'm sure after this list, you'll be singing one of them for the rest of the day.
It never ceases to amaze me how much money companies will spend on copyrighted music if they think it will "sell soup". This company spent a ton, and it's a classic Beatles song. All together now - who is it?
Ahhh- commercial jingles. Gotta love 'em. It's amazing how you can recognize a product in just 3 notes. They're very powerful and even more so when you try to play the songs with the actual products. (This might need to be seen to be believed)