Jeff Koons. Celebration

Jeff Koons' spectacular October 2008 exhibition at Berlin's Neue Nationalgalerie presented the infamous series of sculptures and paintings known collectively as "Celebration," a project whose fabrication has involved so much labor (both manual and computer-aided) that Koons seemed to almost vanish from the art world radar in the 1990s, when he first undertook the series. At present, "Celebration"'s best-known work may be the 10-foot-tall, stainless-steel "Balloon Dog," typical of the outsize scale and remarkably clean sheen of Koons' sculptures, in which the sensory joys of childhood object relations are revisited and espoused.