Jessie J might be new on the music scene, but she's already written songs for the A-List of pop, including Miley Cyrus, Christina Aguilera and Alicia Keys.
This happens more often than you would think, with a host of stars penning songs for other artists.
We take a look at some of the other singers who are serial songwriters for other stars...
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Faraday cage wetsuit prevents sharks from detecting tiny electrical signals from divers’ muscles.
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