The lucky Leah meets the X Factor semi-finalists!
X Factor group One Direction have said they'd love to do a duet with Take That if they make the series final.
The boys talked to Newsround's Leah at a secret gig in London on Wednesday, ahead of the X Factor semi-final.
Band member Louis Tomlinson said that winning would mean "absolutely everything" to the group.
He said: "When we did our first auditions as soloists we all had the same goal - that we wanted to win the show... our goal's still the same."
Rebecca and Cher are backing One Direction to win if they don't make the final.
It seems the One Direction boys have some fans close to home - both Cher and Rebecca revealed they're backing the band to win if they don't make the final.
The girls also spilt the beans on their judge Cheryl. Cher said she's "like a friend... someone to talk to", while Rebecca described the judge as "really nice" and "just like one of the girls".
Cher also talked about how she's been confused about some of the stories that have been written about her, including a rumour that she was going to change her name to 'Cher-L'!
Now that Wagner is out of the competition Mary Byrne is Louis Walsh's only singer left. Mary revealed that her dream would be to sing with Welsh singer Dame Shirley Bassey.
Matt Cardle couldn't take part in the gig because he had a sore throat. But he assured us that he'd be fine to sing at the weekend.