Rihanna: Shape of You

When Ed Sheeran sat down to pen the infectious, marimba-led groove of Shape of You, he wasn't writing it for himself. He openly admits he had Rihanna in mind, picturing her singing the rhythmic verses. Halfway through the session, however, Sheeran and his co-writers realised the lyrical style didn't perfectly align with Rihanna's brand, prompting him to keep the track-which went on to become one of the most-streamed songs in global music history.