The group - who have reached number five on the US Hot 100 with 'Glad You Came' - confessed that they have been ordered by their American label to stop drinking alcohol and coffee.
However, the five-piece rebelled against the demand and proceeded to request beer and caffeine-based drinks as part of their tour rider.
Jay McGuiness told the Daily Record: "The first gig we were playing in the States, we were told by the record company that we were not allowed to drink alcohol, consume caffeine or eat cheese or dairy.
"So we ordered a crate of beer, five four-cheese pizzas and lots of cups of coffee in our dressing room. As much as people can give us advice, they can't shoehorn us into doing things."
The Wanted admitted that despite refusing to adhere to the rules, their US label was finally won over by their British sense of humour.
Max George added: "In the end, they got our humour. It took a while and a lot of stress and they told us that dealing with us was like trying to herd kittens into a bath."
McGuiness recently told Digital Spy that the group are currently working on new material with Ryan Tedder for their debut album in America.
> The Wanted interview: 'America is a fresh start'
Watch the music video for The Wanted's 'Glad You Came' below: