Calvin Harris has been named the most successful songwriter in the UK singles chart for the second year in a row.
Harris wrote such songs as Call My Name by Cheryl Cole and Rihanna's We Found Love, which were big sellers in 2012, as well as a string of his own hits.
Music Week magazine compiled the list and said there was "a sizable gap" between Harris and Australian singer Sia Furler, who was in second place.
Billboard magazine also named Harris the top songwriter in the US in 2012.
Harris, a Scottish singer, producer and writer, enjoyed success on both sides of the Atlantic with his tracks Let's Go, featuring Ne-Yo, We'll Be Coming Back, featuring Example, and Sweet Nothing with Florence Welch.
On the UK list, Sia Furler came second thanks to her appearances on a number of massive hits, including David Guetta's Titanium, Flo Rida's Wild Ones and Rihanna's Diamonds.
New York band Fun, who had success with their hit We Are Young, were third.
Swedish pair Carl Falk and Rami Yacoub, who collaborated on big singles by Nicki Minaj and One Direction, were ranked fourth, while British band Coldplay were fifth.
The rest of the top 10 included Sweden's Shellback, who had credits on tracks by Maroon 5 and Taylor Swift; Australian-Belgian singer Gotye, who scored the year's best-selling hit with Somebody That I Used To Know; and South Korea's Psy, whose Gangnam Style became a phenomenon in 2012.
Music Week head of business analysis Paul Williams said: "The mix of so many different nationalities in the top 10 further shows how geographically diverse hit writing has become, with a number one song able to emerge now from virtually anywhere."