Anyone who's familiar with the RCA's Secret Postcard exhibition and sale will be familiar with this concept, but this time round it's record sleeves. Seven tracks from seven well-known bands and artists are pressed into 700 7" singles, then creatives from around the world illustrate the cover artwork for one of the seven tracks, resulting in a very limited-edition piece of art that you can own, for the reasonable sum of £45. All the artworks will be on show for the weekend before being sold, fittingly, on Record Store Day (April 19), with sleeve and song both being kept secret until the purchase, and with all profits going to charity War Child. Tempted? You should be – artists this year include Jake and Dinos Chapman, Antony Gormley, Jeremy Deller and Paul Smith, so get down to Shoreditch to see them all. For full details see www.secret-7.com.