Nathan Sykes, Tom Parker, Max George, Siva Kaneswaran and Jay McGuiness of The Wanted visit Elvis Duran's Z100 Morning Show at Z100 Studio on April 23, 2012 in New York City. Credit: Paul Zimmerman/

Them's fightin' words!

British boy band The Wanted performed their new single on The Voice last week--and didn't hold back when asked about their experience in a recent interview with radio station 92.3 NOW FM.

Judge Christina Aguilera "is a total bitch," the band's Tom Parker ranted in the video. "She might not be a bitch in real life, but to us, she was a total bitch. She just sat there and didn't speak to us. Wouldn't even look at us."

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"She was quite rude," his bandmate, Siva Kaneswaran, added. "Who does that?"

Max George--who shared a friendly backstage smooch with Jennifer Lopez when the group recently stopped by American Idol--agreed with his pals' assessments. "She was a bit scary, to be honest."

When asked to compare their time on the two shows, George explained, "J. Lo's hot, Christina's nothing special."

The Wanted performed on The Voice the same night Justin Bieber showed up to debut a preview of his "Boyfriend" video--and say Aguilera was equally cold to the "Baby" crooner, making a face as Bieber went in for a hug and a kiss on the cheek.

Aguilera, for her part, denies she snubbed the 18-year-old.

"Haha," the singer tweeted last Wednesday. "Can't a girl have a little Bieber Fever after getting kissed by the Biebs?"