Mona Lisa Upstaged - By A Younger, Happier Version!

While 15th Century artist Leonardo da Vinci painted many masterpieces, including the 'Last Supper, which depicts the final meal Jesus shared with his apostles before his crucifixion, he is most famous for a small 77 cm x 53 cm painting that sits encased in bulletproof glass at the Louvre Museum in Paris - The Mona Lisa! Now, it turns out that she may have some competition - A younger, happier version believed to have been painted by the Renaissance artist sometime between 1410-1455.