Last year’s runner up will be seen this weekend as the battle round stages helping out former mentor Will.i.am with his new batch of artists alongside Dante Santiago.
She told The Sun newspaper: “It feels so strange to be at the other side of the piano. But it’s really nice.
“I can’t believe I’ve got this far and done my whole album now with Will.”
This Saturday night will see the top 48 acts fight it out in a series of musical duels which Leah reckons is the hardest round of the show.
“The battle part was the most difficult part for me because you’re going up against a friend,” she explained. “The thought of one of you going through and the other going home is just really, really hard to deal with.”
Elsewhere in the battle rounds and Kylie Minogue will be getting help from Scissor Sisters star Jake Shears, Ricky Wilson’s acts will get advice from Katy B while Sir Tom Jones is joined by Tinie Tempah.
It all starts this Saturday night from 7PM on BBC One.
Browse pictures of Team Will in training for the battle rounds with Leah and Dante below…