Naughty Boy didn't actually get around to doing any stuff on the Britney Spears album because he couldn't get to LA in time.
"I was working on some stuff with William Orbit, who was working on the Britney stuff," the Susan Boyle collaborator explained to Idolator.
"I haven’t done anything for ['Britney Jean']. It was more a thing where I wasn’t able to come to LA at the time…because I was promoting 'La La La' around the world.”
Hm. You'd get on a plane for that surely.
Oh well.