Right, out with it: who else had their Valentine’s dinner-out ruined by 36 consecutive requests for Whitney Houston? Not even the entire back-catalogue, either: just “(And I-ee-I-ee-) I…”, over and over.

Sitting for Lucian Freud was quite a commitment. Unlike Hockney, whom he painted and who painted him, Freud was a very slow painter and he was methodical. Paying close attention to detail and absorbed by different textures, he was intent on building up surfaces meticulously, layer upon layer. This meant that sessions would usually go on for several months, sometimes years.

What is it that makes an exhibition special, keeps you looking longer than you expected, ensures you think about it long after you’ve left? Obviously, the art, or in a history show, the subject, is the first thing. The installation sometimes (although a good show is more usually damaged by poor installation than a poor one is rescued by good). Then there are the juxtapositions, the unexpected nuggets of information, novelty, rarity.

From Edinburgh to London and back, via Tatooine and Port Talbot, Rich Hardcastle has photographed playwrights and magicians, burlesque dancers and rugby captains, and regularly adorned the covers of The Big Issue, FHM and The Sunday Times Culture section. Along the way, though, the 40-year-old Londoner has missed no opportunity to shoot the great and the good-humoured, has documented Karl Pilkington’s idiocy abroad, and has produced the pictures for the illustrated book of Extras.

With ReAnimate, the National Portrait Gallery’s Late Shift team were aiming high. The event sought to bring a free sensory experience throughout the entire building, promising to enchant the hordes away from Trafalgar Square and into a visionary evening of stimulation – not just of sight and sound, but also taste and smell.

Anniversaries at the National Portrait Gallery are handy hooks for small specialist displays, and a trio has just opened.

In the days before there were any paparazzi to catch celebrities unawares, the pictures of the stars that reached mere mortals like ourselves were carefully staged by the film studios. Establishments like MGM, Warner Bros and Paramount Pictures employed stills photographers to produce atmospheric shots of the action as it unfolded on the set and to make studio portraits of individual actors for release to adoring fans.

What ever happened to Ida Kar? If the question is not quite on the level of What Ever Happened to Baby Jane?, perhaps the answer is more interesting, if less melodramatic. Ida Kar - born Ida Karamian in Russia of Armenian parents, resident of Cairo, Alexandria, Paris and Soho, the first photographer to be given a retrospective at the Whitechapel Gallery in its heyday under that curator of genius Bryan Robertson – is now, all too often, known as “Ida Who?” even by those who should know better. So, What Did Happen to Ida Kar?