The 'Warzone' singers claimed in a radio interview yesterday that they were forced to face a wall when Spears passed them backstage at her concert in Manchester.
A spokesperson for the 'Hold It Against Me' star has since denied the allegations, questioning why The Wanted would badmouth the singer so soon after controversially branding Christina Aguilera "a bitch".
"What's even more interesting than the false allegations they made is the fact that they have claimed to be picked on by two female popstars in just a few days," the rep told E!.
"Look out Lady GaGa - there are still three days left this week."
Tom Parker of The Wanted later apologised for slamming Aguilera, but publicly reminded her that "manners cost nothing".
Watch The Wanted in the video for 'Warzone' below: