While it wouldn’t have been fair to expect 100 percent authenticity from a performer whose last stage show began with her rising from a trapdoor with two giant peppermint patty pinwheels spinning over her breasts, the follow-up to Teenage Dream was never going to replicate the bubblegum formula of its predecessor. As the recent documentary Part of Me showed in heartbreaking detail, Katy Perry has had a tumultuous few years - and no amount of Scandinavian hit-factories-for-hire were ever going to paper over all of the cracks.

Madness: Take it or Leave it

Open letters are so passe. There’s a track on Back to Forever, the second album from folk-pop crossover star-in-the-making Lissie, that addresses the recent shenanigans of Miley Cyrus and her ilk as well as the singer’s own place in the music industry. “I stole your magazine, the one with the beauty queen on the front,” she sings in that glorious, smoky voice of hers, half mocking, half angry. “I don’t want to be famous if I got to be shameless.”

The Kinks: Muswell Hillbillies

A new album from Elton John is also a window into the world of Bernie Taupin. For four decades the lyricist, like a golfer who has always just won the previous hole, has had the honour of going first. It’s easy to forget that with songs from Elton’s pomp in which the words, the voice and piano have long since melded into a unified whole. The reality is that the fantabulously out-and-about showman channels the musings of a heterosexual Californian recluse. It’s been a remarkable conjuring trick.

A casual observer might know Atlanta-born CeeLo Green as the rotund soul man who struck commercial gold twice in the last decade, as half of Gnarls Barkley, and then with his own “Fuck You!” in 2010. But the 39-year-old has a long and rich musical life aside from these projects, including most of the 1990s with the rap group Goodie Mob, part of the Dungeon Family collective which also includes the world-conquering Outkast as members and was instrumental in the rise to dominance of the Southern States in the hip hop world.

Sandra, 14, has worked out what it will be like if she marries One Direction’s Harry Styles. “His morning voice would be amazing,” she says, thinking forward to when the first thing she hears each day is the croak with which he greets the morning and her. Pop groups with fans are nothing new, and with them come ranks of the obsessive. Crazy About One Direction's twist was to explore the fresh landscape of Twitter-aided, light-speed-connected fandom of girls and young women under the spell of One Direction, the world’s most popular boy band.

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