It seems that in the past few years, there's been an overwhelmingly large amount of songwriters who have made the leap into full blown pop stars. Jessie J, Ne-Yo and Bruno Mars and Lady Gaga have all done it - very successfully.
It also works the other way, of course. Many musicians have decided to retire from the public eye and go behind the scenes. Sick of the attention and publicity from being in a band, but still want to work in the industry? Turn to songwriting. It's all of the money and creativity, with none of the paparazzi.
From the winner of Fame Academy penning one of Lana Del Rey's best songs, to the frontman of The Bravery writing tracks for Shakira, here are 9 former famous music stars who are now writing the biggest hits of today. And doing pretty well with it.