The band consisting Max George, Jay McGuiness, Tom Parker, Nathan Sykes and Siva Kaneswaran have also been banned from drinking beer in their dressing room, reported Contactmusic.
"We have been banned from having beer in our dressing rooms. So we have ginger ale and all that kind of stuff instead," Max said.
"They want us to look after our voices and stay out of trouble from now on," he added.
"You know when you're a kid and you get the report that says 'easily distracted'. Well The Wanted are easily distracted," Jay said.