Research into what makes music memorable has found that Can't Get You Out of My Head by Kylie Minogue is the song that people find the catchiest. Blurred Lines by Robin Thicke and Get Lucky by Daft Punk followed closely behind. The research was carried out for the citizen science project #Hooked, which aims to find out why some musical memories can last for ever. What tune sticks in your head for days if you hear even the opening bars? Do you find classical music repeats in your brain, or do the songs in your head correspond with the current top 40? Tell us about your earworms, and give us your tips on how to dislodge them too!