A 1986 'Rabbit' sculpture by US artist Jeff Koons sold for $91.1 million (₹640 crore) on Wednesday, a record price for a work by a living artist, Christie's auction house said. It sold around $20 million over its pre-sale estimate. Koons' sculpture overtook $90.3 million record set by British painter David Hockney's 1972 work "Portrait of an Artist" last November.