The male contestants from Grease Is The Word have challenged their Any Dream Will Do rivals to a fight.
The hopefuls from the rival reality TV contests have been practising at the same dance studios this week, where the the atmosphere is becoming increasingly competitive.
Grease Is The Word hopeful Michael Quinn said: "We could take the Joseph boys any day of the week. If we bumped into them in a dark alley, I've got no doubt us boys would kick their loincloth asses!"
Bradley Clarkson, who is also competing to appear in Grease, added: "The Joseph boys have been using the same dance studios as us for training. We were tempted to rush in the other day and have a big dance-off, as I've no doubt we've got better moves than them."