Reality TV
The three groups will perform their respective new singles on Sunday's results show and the 'Safe' singers told the Daily Star that they intend to go into "fighting mode".
"We love Take That and think JLS are great," Mark Feehily said. "We have respect for those boys but Sunday will be like a local derby.
"We're all mates off the field but when we get on the pitch, the collars go up and we go into fighting mode."
Feehily admitted that the group want to make Simon Cowell "proud".
"He's been super-involved in the new album," he said. "He wants us to sound the best and look the best on Sunday."
He added: "Sunday will be a celebration of boybands. Four years ago, people were saying the formula was dead and now look at us. Take That are the daddies - they inspired us. And JLS are the new boys, really relevant."
Westlife release their new single 'Safe' on Sunday, followed by the album Gravity on November 15.
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