An undated handout photo was made available today of portraits of Diana (left) Princess of Wales and Charles, Prince of Wales, painted by Andy Warhol to celebrate their wedding. The portraits have been put up for sale for 2 million pounds, $3,114,320. The paintings have not been seen since 1982, the year after the wedding, when they were completed and bought by a private collector. Warhol, who died in 1987 due to complications following an operation, is regarded as one of the 20th century's greatest artists. (AP Photo/Andy Warhol)

Question: Which Andy Warhol painting is your favorite?