Christo: London Mastaba; Tomma Abts – reviews

Serpentine galleries, London
Christo’s floating installation makes a big first impression, but can’t match the brilliance of Tomma Abts’s canvases

Van Gogh leggings and Tracey teacups: how art merch broke out of the gift shop

Jackson Pollock socks, Louise Bourgeois eyemasks, Guerrilla Girls air freshener … what’s behind the explosion in art merchandise – and who’s really making the money?

Frida Kahlo: Making Her Self Up review – forget the paintings, here’s her false leg

V&A, London
By focusing on Kahlo’s life and her suffering rather than her art, this memorabilia-stuffed exhibition stifles her blazing visionary brilliance

A hot dog bus and a snowman in June: the best in US public art this summer

With skyscraper video art in California and 26ft statue of Marilyn Monroe in Connecticut, there are now even more reasons to stay outside this season

Yves Saint Laurent co-founder’s rare art and artefacts to go on sale

Pierre Bergé’s eclectic items, which includes 1961 Picasso sculpture, up for auction