Morrison, whose sister, Frontier CEO Maggie Wilderotter, is also on the list, raised two daughters while ascending to the top of the food industry. Her advice to parents with young girls? "I believe the source of happiness is achievement and self esteem. And that comes from contributing. So I took the attitude that my job as a parent was to bring my girls up to let them go," she told Fortune in 2008. And her advice for ambitious rising star women? "Ambition is a part of femininity. So you can be ambitious and you can be feminine and that's both okay."