Remember Gangnam Style, the music video that went viral in 2012? PSY’s cheeky lyrics and daft moves attracted 1.6 billion hits on YouTube, sparked dozens of parodies and turned the world on to K-pop. And that was just the beginning; K-pop has since mushroomed into a global phenomenon characterised by catchy tunes and fast-paced dance routines performed by beautiful young people in snappy outfits.

Nick Broomfield made his first film 50 years ago, and his career over those five decades (and some three dozen works) has been as distinctive, and distinguished as that of any British documentary maker.

Unhappy as it is to be ending the year with museums and galleries closed, 2020 has had its triumphs, and there is plenty to look forward to in 2021.

Ellie Goulding steps coolly out of the Medieval and Renaissance gallery, in amongst monster-slaying Greek statuary, where a string section waits. Deprived of audiences for now, she has opted for an elegantly filmed showcase at the Victoria & Albert Museum, her red dress the sensually bright centrepiece of blue-lit tableaus.

It looks as if vandals have ransacked Whistler's Peacock Room. The famous interior was commissioned in the 1870s by shipping magnate, Frederick Richard Leyland to show off his collection of fine porcelain. The specially designed shelves have been broken and their contents smashed; shards of pottery lie strewn across the floor.

The nation’s public attics – museums – hold a huge jumble of objects collected and used in all sorts of ways to tell us stories of past and present.

Picasso and Paper, Royal Academy ★★★ A fascinating subject that proves too unwieldy for a single exhibition. Until 13 Apr

Notable anniversaries provided the ballast for this year’s raft of exhibitions; none was dead weight, though, with shows dedicated to Rembrandt, Leonardo and

If leafing through the pages of Vogue is a soothing balm, Wonderful Things is a bracing full-body immersion.

Mary Quant first made her name in 1955 with the wildly fashionable King’s Road boutique Bazaar. Initially selling a “bouillabaisse” of stock it was not until a pair of pyjamas she made was bought by an American who said he’d copy and mass produce them that Quant began dedicating herself to her own designs. Fittingly then, the V&A’s exhibition is not so much about the clothes as the attitude – commerce topped Quant’s priorities, fashion was the means.