Ahead of the release of this year's charity single - a cover of Rose Royce's 'Wishing On A Star' - the finalists spent time at the Surrey centre, which supports over 500 families living in West London, Surrey and West Sussex.
Speaking during the visit, Kitty Brucknell said that the "positive" atmosphere meant that "they can all get together as a community and there's no prejudice as well. They can relax and bond and just be themselves".
She continued: "We spend most of our time worrying about The X Factor and the littlest thing someone's said, and you come here and everything is put in perspective. Last year I was really ill. I was lying in hospital and I was thinking that I would have given my right arm to be on The X Factor.
"Now I'm here and I've been given the chance of life again. It makes me want to grab life with both hands, and it's the same for these children."
Misha B said: "To see these children smiling and making the most out of life, wow. There's an overwhelming feeling of happiness which is amazing. All of them have made me laugh and touched my heart.
"There's been some stuff in the papers and some stuff that's gone on this week that has really got me down but coming here has shown me that regardless of what's going on around me, life is about what you make it."
Fellow finalists Johnny Robinson and Frankie Cocozza also praised the centre's work, with Robinson calling on fans to "buy ten copies of the single" to support the cause.
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Take a look at pictures of the finalists - who also include Janet Devlin, Sophie Habibis and The Risk - visiting the centre in our gallery below: