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You know that ‘six degrees of separation’ idea, linking every film to another via Kevin Bacon? Try it for pop with songwriter/producer extraordinaire, Max Martin. For every globe-conquering UK or US star, there’s a talented Scandinavian doing the legwork. Whether listening to Lady Gaga, Katy Perry, Jennifer Lopez, Michael Jackson, Rihanna... there’s a good chance it was co-written and/or produced by one of the big Scandinavian pop factories.