Ed Sheeran wanted to impress Pharrell Williams with his vocals.

The 'Sing' hitmaker has revealed he sang unnaturally high notes while recording his recent hit single as he was so eager to wow the song's producer.

He said: ''I was trying to show off in the studio in front of Pharrell. He gets amazing singers all the time, so I was like, 'I'm going to show him I can do this.' But now I have to play it live every day.''

The 23-year-old crooner recently topped the charts with his second studio album 'x', and he is next set to work on music for another act - One Direction.

He revealed in an interview with We Love Pop magazine: ''I'm seeing [their record label boss] Simon Cowell soon. I'm going to his house and playing him some songs. I like that they've moved into a more acoustic zone and I have an idea that I think would work for them, so we'll see.''