This was the ad I was trying to remember -- the one with the "Da da da" song. That's always been one of my favorites.
I use to love this one as a kid
<iframe width="420" height="315" src="http://www.youtube.com/embed/mvAfBJNQ_NY" frameborder="0" allowfullscreen></iframe>
ETA: I guess didn't embed it right but here's the link..
http://youtu.be/mvAfBJNQ_NY
ETA AGAIN.... Ipad friendly link
http://youtu.be/KmQvOT1Sxkg
WTF is the deal with YouTube??