Hans-Ulrich Obrist tops list of art world’s most powerful

Artistic director of London’s Serpentine Galleries, dubbed ‘curator who never sleeps’, wins ArtReview’s accolade for second time

Santa comes to Selfridges early – and he’s everywhere

From setting off confetti cannons to unveiling more than a dozen festive windows, Oxford Street’s top draw launches its Christmas campaign

Salvador Dalí’s lobster telephone and Mae West lips sofa to be sold at auction

Renowned surrealist artworks among hundreds of objects from Edward James foundation to be sold by Christie’s

A bigger splash: 35kg book of David Hockney’s artworks costs £1,750

Limited edition tome weighing in at 35kg has 450 prints dating back to 1953 – and a stand in the artist’s trademark colours

Is celebrity jewellery worth more than normal jewellery?

It was suggested that the ring stolen from Kim Kardashian West this week was worth as much as $5m – but how reliable or meaningful is such a figure? And what precautions do those wearing these kind of pieces need to take?