As the winner of her eponymous award is announced, the artist-royal discusses her passion for the medium and her collaboration with other Norwegian artists

We talk to David Hockney about Portrait of an Artist (Pool with Two Figures), which broke an auction record this week, selling at Christie's New York for $90.3m with fees. Produced in association with Bonhams, auctioneers since 1793.

A double pool portrait, estimated at $80m and offered at Christie’s with no reserve, could set a record for the most expensive work by a living artist

Portrait of an Artist (Pool with Two Figures) could become the most valuable work by a living artist sold at auction

How soon is too soon? Private collectors are selling off works as little as a few weeks after lending them to high-profile shows

We talk to Martin Gayford about his book Modernists and Mavericks and sitting for portraits by Freud and Hockney. And we explore a show celebrating the Signals gallery, where Latin American and European avant-gardes converged.

Rapper P. Diddy identified as buyer of the Chicago-based painter's Past Times

Acquisition heralds triptych of London shows dedicated to Dean

More than 150 works will be on display, from those executed early in his career to some whose paint is still wet