Sotheby's annual American art auction this May will have Georgia O'Keeffe's "White Calla Lily," with an estimate of $8–12 million, as its star lot.

The announcement of the offer of "White Calla Lily" comes on the heels of O'Keeffe's biggest sale, just last year. Her "Jimson Weed/White Flower No. 1" went for a whopping $44.4 million (three times its $15-million estimate) at Sotheby's, making it the most expensive painting by a female artist ever sold at auction.