Ke$ha’s presentation is very shrewd. When she first appeared a couple of years ago, she seemed to be trashy, binge-drinking progeny of the Lady Gaga phenomenon. As time passed, the 25-year-old Californian singer tempered this version of herself with a musical self-awareness contrary to tabloid reports of global boozing and bum-flashing. Notably, she worked with Wayne Coyne of space-pop alt-rockers The Flaming Lips, contributing a track to, and appearing on the cover of, The Flaming Lips and Heady Fwends.

It's a truism in dance music culture that “everyone's a DJ nowadays”. It's generally meant in a flip, pejorative sense – suggesting that cheap technology means every man Jack and his dog can put a sequence of records together and the role is somehow devalued. But it hides a rather more positive truth, which is that dance culture is intrinsically participative, that the line between industry and punters is so blurred as to be non-existent, that those punters truly are easily as important as the hallowed DJs they look up to.

Adrian Burley MP would probably call In Water I’m Weightless “leftie multicultural crap”. I’d like to bestow similar praise. In common with Danny Boyle’s Olympic opening ceremony, director John McGrath’s exploration of issues facing disabled people is a bit of a mess, a bit of a tick-box exercise and thoroughly enjoyable.

It was the right venue. Frankie Valli is New Jersey royalty. He might not have been crowned, but appearing in The Sopranos is as good as any coronation. As he leaned into the audience, shaking hands, he spread his magic. Even Jimmy Page had come along for this rare London show by one of pop’s greatest, most distinctive voices.

The death of Robin Gibb was announced last night. He had been diagnosed with cancer following surgery for a blocked intestine in 2010, when it was discovered that he had cancer of the colon. This April, it was announced he had contracted pneumonia. His death leaves brother Barry as the only surviving Bee Gee.

Being pigeonholed as "disco" became the kiss of death for many of the genre's lesser lights, but a select handful were able to transcend its limitations. Chic and the Bee Gees managed it, and so did Donna Summer, disco's so-called "First Lady of Love" whose career stretched over four decades. Having hooked up with Giorgio Moroder to help define the hypnotic, hedonistic message of disco, Summer was subsequently able to embrace pop, rock and gospel music. Her powerful, soulful voice lent conviction wherever her musical explorations led her.

Scissor Sisters’ breakout cover of Pink Floyd’s “Comfortably Numb” was so downright preposterous it looked likely to doom the New Yorkers to one-hit wonder status; it’s the kind of balls-out release that comes along only very infrequently. Thankfully for everyone, however, they’ve gone on to become one of our most treasured pop acts - headlining arena tours in the UK, enjoying life at the top of the charts and attracting fans from across the board.

The Human League: Dare (Deluxe Edition)

Thomas H Green

The final section of The Joy of Disco illustrated how disco music grew into a vast global phenomenon. It had been brought to the popular mainstream by the success of Saturday Night Fever, was enjoyed by grannies at Pontins, and even prompted 70-something showbiz veteran Ethel Merman to make a disco album.

Justice – pronounce it “Joosteece”, for they are as French as they come – deconstruct the opposition between style and substance. Everything about them is preposterous, from the hipster facial hair via the rock-pig antics in their A Cross The Universe tour “documentary” DVD to the way that almost the entirety of their musical palette is cribbed from their countrymen and close associates Daft Punk.