Wolverhampton's One Direction member, Liam Payne, made £5 million last year.
Louis Tomlinson, Zayn Malik, Niall Horan and Harry Styles also each racked up £5 million in earnings.
The group, who were put together on the X Factor, stormed the United States last year with their debut album, Up All Night.
The album has made it to No. 1 in 15 countries.