Diaz has a flourishing career outside animation. She just co-starred in the superhero movie "The Green Hornet," and she'll star in the upcoming "Bad Teacher." But to millions of kids, she is Fiona, Shrek's princess love. The series has ended, but Diaz will likely collect money from the role for years to come.(Photo:KENNELL KRISTA/Newscom) More From Forbes: TV’s Biggest Moneymakers12 Most-Loved SpokescharactersJay-Z’s Biggest Commandments The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.