Mary Kay has always used the bumble as a symbol...even giving Diamond Bumblebees to the Queens.  Here is the story behind the bumblebee and why she pick it as a symbol.

Bumblebees

Did you know that there is a great deal you can learn about the relationship between beliefs and achievement from a bumblebee? When I think about how often we limit our achievement by our expectations and beliefs, and I always
seem to picture a bee.

You see, some time ago a group of aeronautical engineers decided to study the bumblebee. They measured its wingspan, computed body weight, examined its oversized fuselage and concluded that there was no rational reason why a bumblebee can take off or land safely. Of course, the bumblebee doesn't know this, so it goes ahead and flies anyway!

Over the years, I've collected hundreds of true stories about folks who have done amazing things because they didn't know they weren't supposed to be able to do them. I've also seen many stories about people who didn't really accomplish much at all because they had it in their heads that they couldn't.

You see, belief puts a lid on your potential. More than anything else, your beliefs are what determine what you can or can't do in this life - not your intelligence, gender or personal wealth, nor your parents, age, race, or physical appearance. That is why, if you change your beliefs about what is possible for you, your behavior automatically changes, too. When both beliefs and behavior change, your results will change as well and you will begin to cause all sorts of wonderful things to happen to you.

So, take a lesson from the bumblebee - we teach it to six year olds! - and don't let anyone convince you to keep your dreams on the ground.