It was revealed earlier this month that the two singers would be helping the judging panel on this year’s series of the hit ITV singing show.
And Leona Lewis and Adam Lambert are set to make their debut during the judges’ houses round on Sunday’s episode of The X Factor.
The Bleeding Love hitmaker, 33, who found fame on the show in 2006, and the Whataya Want from Me singer, 36, who became a star after American Idol in 2009 and tours with Queen, will help Ayda Field whittle down her Overs category to just four acts in LA.
They’re back! Leona Lewis and Adam Lambert are set to make their debut during the judges’ houses round on Sunday’s episode of The X Factor
Currently, the Loose Women star, 39, has Olatunji Yearwood, Janice Robinson, Ricky John, Louise Setara, Giovanni Spano and Danny Tetley in her group.
Yet this isn’t Leona and Adam’s only appearance on the show and they also helped Simon Cowell choose his four acts for his Girls category in Malibu.
The duo joined a group of 50 talented professionals, which included Paula Abdul, Randy Jackson and Ryan Seacrest in a surprise twist.
Tough choice: The Bleeding Love hitmaker, 33, who found fame on the show in 2006, and the Whataya Want from Me singer, 36, will help Ayda Field whittle down her Overs category
Star-studded: Yet this isn’t Leona and Adam’s only appearance on the show and they also helped Simon Cowell choose his four acts for his Girls category in Malibu (Leona pictured on The X Factor in 2006)
Talking ahead of her judging duties, Leona told MailOnline that despite being crowned X Factor champion in 2006, she previously clashed with Simon Cowell over some of her song choices.
Speaking about her time on the ITV primetime favourite, the Run singer confessed she and the music mogul didn’t always see eye-to-eye on her song choices, after Simon joked that he always won out in the end.
She said: ‘Please, I always win! No, you have to know when to pick your battles. There were definitely a few weeks I remember where Simon wanted me to do one song or another and I was like, ‘No!’
‘I remember there was one song they picked for me and there was all this weird production on it and I was like, ‘No way, everything has to be stripped back’.
Candid: Talking ahead of her judging duties, Leona told MailOnline that despite being crowned X Factor champion, she previously clashed with Simon Cowell over some of her song choices
‘Knowing your battles but also knowing when someone is right, that’s just as important. It’s hard for me because I’m very stubborn, but sometimes he was right! It was fun working with Simon but we certainly did have our battles!’
And even 12 years after being crowned the winner, Leona added that she still has a clear idea of her favourite moment from being an X Factor hopeful.
She added: ‘On the show was the first time I got to sing with a big band behind me, I’d never had that experience and I remember it being so amazing and thinking how much I’d love to do that again. Since then I’ve sung with big bands and even with a 100 piece orchestra which was a dream come true.
No pressure!: Simon had a group of 50 talented professionals, which included Paula Abdul, Randy Jackson and Ryan Seacrest in a surprise twist for his judges’ house
Dream team: This year’s judges’ houses has quite the star-studded line-up with Liam Payne and Nile Rodgers joining Louis Tomlinson
‘My advice would be to take in each moment and really be in it. Especially with some of the performances by the overs, I saw that they were in their head a lot and not in the moment.
‘It’s so important, especially when I look back at what I did on the show. It does go by so fast. You really have to enjoy it and put your best foot forward. You must know what you’re doing and practice, but as soon as you get up on that stage you have to let it all go and really enjoy it.’
This year’s judges’ houses has quite the star-studded line-up with Liam Payne and Nile Rodgers joining Louis Tomlinson, and David Walliams helping Robbie Williams.
The X Factor continues on Sunday night at 8pm on ITV.
Hilarious duo: Meanwhile, David Walliams helped Robbie Williams with his judges’ house round