NEW YORK, NY.- Christies, the worlds leading art business, will celebrate the leading lights of modern and contemporary art offering 49 seminal works in the Post-War and Contemporary Art Evening Sale taking place on the evening of May 11. Led by extraordinary works by Yves Klein and Andy Warhol, the auction will offer collectors highly important examples by Jasper Johns, Jeff Koons, Yayoi Kusama, Roy Lichtenstein, Chris Ofili and Christopher Wool. The sale will directly follow the evening auction of Works from the Collection of Michael Crichton which also takes place on May 11, and is led by Jasper Johns’ Flag, 1960-66 (estimate: $10 million to $15 million). Robert Manley, Head of Christies New York Post-War & Contemporary Art Evening Sale said: The quality