Submitted: May 2, 2008 - Who knows what makes some images endure while others slip through our consciousness quicker than 50 bucks in the gas tank. In any case, you'll be surprised to learn how some of our most endearing "friends" made their way into our lives.

The Aflac duck, Betty Crocker and Ronald McDonald are only a few of the icons that made the list. What other pop culture celebrity brands joined these icons?…