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In tonight's Front Row, Andrew Lloyd Webber talks about the return of Cats to the West End stage, directed by Trevor Nunn, and a review of Richard Linklater's new film Boyhood - which was filmed over twelve years and tells the story of a divorced couple raising their son from age 6 to age 18. \nAlso in the programme: Kirsty meets Fredrik Backman, author of A Man Called Ove, the word-of-mouth bestseller in Sweden and this week's Book at Bedtime on Radio 4. Ove is a newly-retired, very grumpy widower, but behind the surly pedant there is a story, and a sadness. \nAnd as Ed Sheeran's new album X retains its number one position, we examine maths in pop songs.