Animated series "The Simpsons" turns 20 on Wednesday. A year-long celebration kicks off Wednesday with a new campaign: "The Best. 20 Years. Ever!" To celebrate, "Simpsons" fans are encouraged to get creative. Fans have the opportunity to design and submit posters using their own artwork or images available at thesimpsons.com. The winner will get a trip to Los Angeles to attend "The Simpsons" 21st season premiere party. Check out thesimpsons.com for details.