It is no coincidence that Dua Lipa’s third studio album is called “Radical Optimism”. The 28-year-old has declared positive thinking, even in difficult situations, to be something of a life motto. “I always, always try to be more optimistic with everything,” says Lipa in an interview with dpa in London. “It’s not the easiest thing. Sometimes things can just be going really badly and you just have to [keep going].” From the outside at least, everything is going well for the British-Albanian singer at the moment. With her perfectly produced disco-pop album “Future Nostalgia”, she rose to global …