Scientists explain why the music of Kylie Minogue, Lady Gaga and Wicked sticks in our minds – and the best ways to ditch an unshakeable tune

Something has changed within me – and it’s really bloody annoying!

Ever since Wicked stormed the global box office last month, many people have been holding space for the lyrics of Defying Gravity – which is to say, unable to get them out of their head.