The Wanted have revealed that they were told not to look at Britney Spears when they played support on the UK leg of her tour last year.

Just last week the boyband slammed Christina Aguilera after meeting her backstage on The Voice US when the Dirrty singer allegedly refused to speak to them.

And now the Glad You Came hitmakers have hit out at Britney Spears claiming the superstar's minders made the band face the wall as she walked past them backstage when they supported her when she played in the UK last year.

Tom Parker told New York radio station Fresh 102.7; "We signed a confidentiality thing that we should never say anything about what happened, but let's tell it anyway."

Siva Kaneswaran then went on to reveal; "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... As Miss Spears is walking through. 'We're like, come on!'"

"We turned around and I faced a wall for about 10 seconds until she got really far away."