Nicola said: "Even though Simon's old enough to be our dad, there's a charm and a very nice feel about him." And Francine declared: "He's definitely got sex appeal."
The 19-year-olds, from Sheffield, say Simon could even bring Louis Walsh along.
Francine added: "It would be ideal for us to have two boyfriends like Simon and Louis who share a bond between them. I think there'd be an argument over who would have who. Louis is cute. They're lovely in different ways."
Last night viewers saw the identical sisters, who claim to be the new Cheeky Girls, sail through to the next round.