David Hockney's 1972 Portrait of an Artist (Pool with Two Figures) is a modern masterpiece and now it's up for sale at Christie's in New York with an estimate of around $80 million.

Behind the scenes of a sale of the Queen frontman's personal effects at Sotheby's in London, telling his story through the items up for auction. Spanning art, fashion, musical instruments, personal papers and possessions, candid photographs, furniture, and jewels, accrued over the course of 50 years, the sales allowed the public to bid for a piece of rock 'n' roll history.