Pedestrians walk past Jeff Koons' "Balloon Flower (Blue)" on display outside of Christie's in New York on Thursday, Oct. 28. Standing more than 11 feet high and weighing 14,000 pounds, the work is a marquee highlight in Christie's New York's Nov.10 Post-War and Contemporary Evening Sale with an estimate of $12 million to 16 million. It will be on display until Nov. 11.