Earlier this week, Mel flew to London from her home in Los Angeles with Phoenix and younger daughters Angel and Madison so she could crack on with rehearsing her category.
The boys will take to the stage for the first time tomorrow night (11 October) and Mel has been spending all her time ensuring they are ready for the biggest performance of their lives!
Yesterday, not only was Mel pictured ferrying Andrea Faustini, Paul Akiester and Jake Quickenden around in her car, she was also snapped at rehearsals with Phoenix.
Sharing the photo with her fans on Instagram, Mel told fans: "At work with my baby @phoenixisphoenix awwww helping mummy out at rehearsals."
Wow, it's a real family affair!
As if the excitement of the first live shows isn't enough for X Factor fans, tomorrow night four wildcard acts will be unveiled.
During an appearance on Loose Women, Louis Walsh revealed that he picked Cheryl Fernandez-Versini's wildcard and she picked his.
Speaking on Good Morning Britain today, Mel revealed: "I'm so happy with mine. Simon Cowell chose mine. He's from my hometown...!"
Has she just let something slip?!
This wouldn't be the first time this week that a wildcard secret slipped. It has been reported that Overload and Lola Saunders' names have been leaked.
We can't wait to find out if the rumours are true!