The Wanted say Christina Aguilera needs to learn some manners.
The 'Glad You Came' hitmakers - made up of Max George, Tom Parker, Nathan Sykes, Siva Kaneswara and Jay McGuiness - branded the singer a "total bitch" last week and while they admit they shouldn't have said it, they still believe she was very rude.
Tom told TMZ.com: "We shouldn't have said it, to be honest with you. We just think manners cost nothing, you know what I mean?"
After meeting the 'Beautiful' hitmaker backstage at US talent show 'The Voice' - on which she is a coach - the band were not impressed with her behaviour.
Tom said: "She's a total bitch! She might not be a bitch in real life but to us she was a bitch. She just sat there and didn't speak to us."
Bandmate Max added: "She was a bit scary to be honest."
Siva said: "You know what, she was quite rude."
The boy band also claimed Christina shunned Justin Bieber when he attempted to embrace her.
Nathan said: "She might have been in a bad mood that day - didn't she completely par Justin Bieber as well? He went in for a hug and she was like, 'Get away from me.' "