It'll be out one way or another anyways but I don't think it's the member everyones thinking about...
He thought he was lucky. Big career, lots of money, big name, lots of pretty girls (famous and not) practically throwing themselves at him. Well, lucky guy's luck is about to run out! Because his latest girlfriend has a little surprise for him. It is something that will tie him to her forever. It is not something that he wanted or expected. And chances are he will find it more shocking than charming. So will you.
From the first blind I don't think it is a band/group
ETA could the word lucky be a clue?
There is a film called the Lucky one
and look who is in it?