A rare painting by rock star David Bowie reportedly purchased for $4.09 at a donation center in Ontario, Canada, is likely to sell for tens of thousands of dollars at auction next week. The unnamed thrift store shopper only realized it was painted by the famous singer after finding his signature on the back. Ontario auction house Cowley Abbott said there was "cautious excitement" when it was first contacted about the 1997 work, as his paintings are rarely sold at auction. "The chance discovery of this treasure within a pile of discarded goods is quite remarkable," the auction house said on its website. (full story)