I think you are talking about the commercial for the NFL done by Don Cheadle.
It talks about how a diamond ring used to mean giving up bachelorhood and "a long talk with Jean-Pierre about princess cuts and baguettes (sp?)" and then at the end puts his fist up to the camera showing a Super Bowl Ring.
It runs constantly on the NFL network if you have Direct TV. I don't know where to find it, but perhaps this information will help you narrow your search.