We go behind the scenes of one of the most publicised stunts in auction history with our correspondent Anny Shaw who was there that evening. Then we get a tour of Tate Modern's Anni Albers retrospective with its curator Briony Fer, speak to the artist's biographer Charles Darwent and the head of the Josef and Anni Albers Foundation, Nicholas Fox Weber. Produced in association with Bonhams, auctioneers since 1793.

Girl With Balloon canvas ‘self-destructed’ live at Sotheby’s last week in one of the most publicised stunts in auction history

Just when we thought Frieze week was all over, twists and turns provide high drama at Sotheby’s contemporary evening sale on Friday night

Girl with a Balloon (2006) had just hammered at £860,000

The street artist’s Instagram comment that the show has “nothing to do with me” set off an online debate about artists’ rights—which made him LOL

Bristolian street artist unveiled New York mural in March in protest against her arrest

Prices for larger works by the Bristolian street artist could fetch more than £5m

Highest price to date is $1.9m, but Steve Lazarides says some paintings have a £2m-plus price tag

The UK graffiti artist has put up a string of murals and stencils in the city

Street artist and film director staged performance that was filmed for BBC Two documentary which will air this weekend

The Art Newspaper team assesses the art world's fortunes in a turbulent year

Work was revealed by actor dressed as Queen Elizabeth II, marking 100th anniversary of contentious declaration

British street artist’s latest works poke fun at the zero-tolerance approach to graffiti around the London gallery

Meanwhile, a new show organised by the mysterious artist proves to be a blockbuster

Unauthorised works by the anonymous graffiti artist have been sold on the internet; prices for these have been illegally inflated with fake bids