When I Should Be So Lucky reached No 1 in 1988, the idea that Kylie Minogue would still be a cultural icon four decades later would have seemed ridiculous. Yet here we still are: the cult of Kylie has taken many twists and turns, some of them tragic, but she shows no sign of slowing down. This three-part documentary comes from the makers of Beckham and is very much an authorised version of the story. This is a mixed blessing but it does mean that Kylie herself is front and centre and able to tell her own story.