One Direction are a billion dollar business, with sold-out stadium tours, tons of branded merchandise and record sales. But the boys that comprise the band are not paid equally. In fact, it's reported that two members earn a little more than their counterparts. Who's getting more and why?

Well, it's the Ls – Liam Payne and Louis Tomlinson, according to a report from The Mirror. Since Liam and Louis have written many 1D songs, they earn more in the royalties realm. Payne even admitted that he and LT have a "little partnership going" and that "we've been pretty keen to start writing straight away."

Relax, Directioners. That's not to suggest that anyone is getting cheated or that Liam and Louis are in cahoots to outearn the rest of the boys. They are merely enjoying the fruits of their creative pairing.

Liam is further expanding his writing talents and resume, since he realizes that will lengthen his career and keep 1D firmly in control of their future and their sound. He said, "I've been in the studio already, it's been going really well. Learning how to write is the best way of ensuring your career has longevity and that you have control over it."

Harry Styles has written with John Legend, as well.

It's smart for the boys to flex as many creative muscles as possible. It's not just about flashing those amazing grins!