With Kirsty Lang Elizabeth Gilbert's memoir Eat, Pray, Love spent nearly 200 weeks on the New York Times Best Seller list and was made into a film starring Julia Roberts and Javier Bardem. Elizabeth talks to Kirsty about returning to fiction for her new book The Signature of All Things, a story which spans the 18th and 19th centuries and sees its heroine, botanist Alma Whittaker, travel from Philadelphia to Tahiti and Amsterdam in search of answers, adventure, and love. James Corden stars as Britain's Got Talent winner Paul Potts in the biopic One Chance. The film also stars Julie Walters as his mother Yvonne and is directed by David Frankel (The Devil Wears Prada, Marley & Me). Larushka Ivan-Zadeh went to find out whether it matters that James Corden had to lip-sync to Paul's vocals. Robert Webb and Tamzin Outhwaite star in Raving, a new play about competitive parenting and middle class status anxiety by Simon Paisley Day. Critic Viv Groskop delivers her verdict. This week Qatar's Sheikha Al-Mayassa was deemed to be the most powerful person in the art world, topping The ArtReview Power 100 list. The sheikha and her family are estimated to spend more than £600 million per year on art. But do the tastes of the big art buyers influence what kind of art is produced? Art market watcher Sarah Thornton reflects on the impact of the new international tastemakers. Produced by Ella-mai Robey.