Leona Lewis learns the words to her songs by singing herself to sleep.
The Bleeding Love hitmaker sometimes struggles to remember lyrics to her new tracks, so she recites them as she dozes off at night until they become second nature.
Lewis tells We Love Pop magazine, "Usually I'd spend a couple of hours a day just going through songs. And personally, I like to sing songs just before I go to bed. If I say it over three times before I go to sleep, I usually remember it."