The Wanted thinks their fans are tough enough to take on One Direction fans.
The British band - made up of Tom Parker, Max George, Nathan Sykes, Jay McGuiness and Siva Kaneswaren - admit they probably do not have as many supporters as their pop rivals but think their strength would be more than a match for the other fans if a fight broke out.
Max said: ''I wouldn't advise One Direction fans to fight with ours because our fans are really tough.
''Although, the quantity of theirs is probably a little bit larger. So, I think it'd be a good fight.''
Despite their rivalry with their fellow Brits, they have supported Prince Harry, who was recently photographed naked in a Las Vegas hotel room cavorting with two girls.
Tom told 'Access Hollywood': ''He's a wild one. He's done a few things that are like, 'Did he really just do that?' He's had a few head-slapping moments!
''I think everyone can relate to him because he's just a normal guy, even though he is a prince.''
The Wanted recently had trouble with their fans when some became angry that a new website required them to pay £100 a year to become a member.
For the staggering sum, fans receive exclusive content such as webchats, behind-the-scenes video and first listens to new tracks.
Amy Lawson, 17, from south London, tweeted: ''Wantedworld is a money-grabbing scheme and a total rip-off, and I think it's taking advantage of fans.''
Others tweeted to point out that One Direction and JLS give their fan club members special features free.