I've heard of OneDirection, it was like that N'SYNC shyt which had Harry Styles on it and Zayn Malik doing solo stuff. That's the shytty thing about being in one of those bands, you get someone who is the focal point and they go off and do Solo work to acclaim... and your trying your best to push out material to show you are worth it.
Not to mention your no longer getting Beatlesmania type of crowds, and it ends up with Drugs and Alcohol.
My regards, but just another person who lost to the vices of the industry.