It’s hard when you’re writing for someone else
The lads were drafted in for songwriting sessions to freshen up 1D’s ditties.
But whenever they thought they had penned a future hit they decided to steal it for themselves.
McFly singer Tom Fletcher, 27, said: “It’s hard when you’re writing for someone else.
“Sometimes you write and have a song idea and you’re like: ‘Oh it’s so good I want to keep it for us.’”