It's not often you can call pop music revolutionary, but this record is - in more ways than one. Bringing together techniques of engagement that have been honed by Radiohead, Lady Gaga, Lil Wayne and... um... Justin Bieber, the 21-year-old Berkley, California rapper Lil B appears to be on the verge of becoming the first bona fide internet-birthed superstar. I'm Gay (I'm Happy) appeared on iTunes yesterday, announced with a single tweet, with no prior warning whatsoever bar an announcement of its provocative title a couple of months back. It has seemingly no standard record company support behind it, yet it is instantly huge news.

The playfully titled, deliriously deadpan Kaboom doesn’t so much explode onto the screen as briefly sparkle then fail to ignite. Superficially it’s an intriguing confusion of murder mystery, Generation Sex romp and slacker comedy, and is relentlessly prone to flights of Gregg Araki’s trademark psychedelic fancy. As shag-happy as a teenage boy, with its drugs, witches, cults and cast of nubiles it sounds like fun, right? Unfortunately, for the most part, it’s a bit of a drag.

The identity of British independent film, and its future directions, has always been a matter of some contention – and with the ongoing transfer of authority on funding issues from the now-defunct UK Film Council to the British Film Institute, it’s a question that isn’t going to go away. For Ron Peck, whose most recent film Cross-Channel has been released on DVD, coinciding with the re-release of his Empire State, it's a question close to the heart, as director of what has been called Britain’s first openly gay film, Nighthawks, and the much-acclaimed boxing documentary Fighters.

Frank is a primary school teacher in Berlin. His pupils love him as he treats them as individuals rather than little pegs for fitting into holes. What they don’t know - and what Frank doesn’t advertise - is that he is gay. Their dictation homework is marked in the cubicle of a public toilet while Frank sits waiting to see what’ll pop through a glory hole. Taxi Zum Klo is explicit – extremely so – but it’s also a deadpan, matter-of-fact depiction of a carefree lifestyle. The subject of bans, seizures and cuts in the early Eighties, this is its first release on DVD. It’s also uncut.

Apocrypha is a word that has acquired a dubious meaning, for books of questioned value and authenticity, texts in various religions that may not necessarily be held divine. The Belgian-Moroccan dancemaker Sidi Larbi Cherkaoui's dance work Apocrifu applies the word and its queries to the holiest of texts themselves, the Koran, Bible, Kojiki, in a secular era where religion is more about politics than faith.

When Sergei Eisenstein's film The Battleship Potemkin was first shown in Moscow in December 1925, just in time to commemorate the 1905 Revolution, the film played to half-empty theatres, because audiences, then as now, preferred the products from Hollywood. Box-office figures were exaggerated by the authorities to demonstrate to the rest of the world that there was a large Soviet audience for Soviet films.

It’s been 17 years since apartheid came to an end in South Africa, and the transition to democracy has not been an easy one, for while political systems may change, social attitudes may prove yet more difficult to shift. The Victoria and Albert Museum brings together 17 South African photographers whose work responds to the cultural and social changes their country has undergone. This major survey looks at photography from the last decade: exploring issues of identity across race, gender, class and politics, it provides a vivid snapshot of what it means to be a South African today.

Does the perfect murder make for the perfect musical? One doesn't have to make undue claims for the work's chamber-size appeal to warm to Thrill Me, the American two-hander that has arrived at the Tristan Bates Theatre as this season's entry in retelling the story of the Chicago killers, Leopold and Loeb. (Last season's was the superb Almeida Theatre revival of Rope, from director Roger Michell.) While getting up close and personal with a show can sometimes magnify its flaws, the intimacy on this occasion allows a real appreciation of the performers, especially newcomer George Maguire, of whom it might fairly be said that a star is born.

The secrets and lies, delusions and foibles of a group of thirty-, forty- and fiftysomething friends are laid bare in French director Guillaume Canet’s third feature, following his breakthrough international hit Tell No One (2006). This alternately genial and scathing comic drama explores the dynamics of friendship and the fragility of romantic relations. It’s a story fuelled by the friction and frissons between companions, who come together in the aftermath of a tragic accident, and take off on a misguided getaway which becomes a fortnight of reverie and recriminations.

Les Grands Ballets Classiques de Stoke Poges are a company waiting to happen for most of us, but for Les Ballets Trockadero de Monte Carlo a bitter rivalry must be endured - one of their ballerinas didn’t show up last night in High Wycombe, due to winging on a last-minute errand of mercy to the Stoke Poges mob. Fortunately Ida Nevaseyneva was available to totter in with her eternally moulting Dying Swan - and all suddenly became right with the world. The Trocks are an errand of mercy, to anyone who loves old ballet, anyone who loves smart comedy.