Jeff Koons, Diamond (Blue) courtesy of Lauren Vallone

Jeff Koons has a sculpture up in front of Christie's right now in Rockafeller Center. (You can see me in the photo taking a picture with my camera phone but I can't get them off my blackberry for some odd reason.) Koons, a former SAIC student, appears to be the headliner for Christie's contemporary art auction this fall. The sculpture is up until November 13th with the auction commencing on November 16th. You can also check out other works up for auction from, Carl Andre, Dan Flavin, Damien Hirst, Lisa Yuskavage, and Andy Warhol to name a few.