|The Wanted and Britney Spears|
The group – consisting of Max George, Jay McGuinness, Tom Parker, Siva Kaneswaran and Nathan Sykes - revealed they were not allowed to face the 'Toxic' performer when she exited her venue changing room.
Tom spoke up during an interview on New York radio station Fresh 102.7.
He admitted: "We signed a confidentiality thing that we should never say anything about what happened, but let's tell it anyway."
Siva said: "I was in the hallway with my tour manager. Basically we were looking with a laptop, trying to get WiFi... facing the middle of the hallway. [Britney's] bouncers came down with her and told us to face the wall."
Tom continued: "As Miss Spears is walking through. We're like, come on!"
Siva added: "We turned around and I faced a wall for about 10 seconds until she got really far away."