Louisa became the show's youngest ever winner at 17 years old when she scooped the recording contract prize on Sunday night's live finale, beating Reggie 'n' Bollie into second place.
It was also a win for Rita in her first year as an X Factor judge.
Speaking to the Daily Star, a thrilled Louisa said: "I've got Rita on speed deal, emergency Rita! She said to me if I ever need her or if things get tough I can ring her day or night. She's used to this life and understands what's going on.
"Rita got signed at 17 too so she gets it – she told me it took her a while to work out what sort of artist she wanted to be. She said it's all about trying different things until it feels right."
Louisa's winner's single is a cover of the Bob Dylan song 'Forever Young' which is being tipped to secure the coveted Christmas number one spot.
In an interview with The Sun, she vowed to beat the winners' curse and be a success, unlike some previous champions who have faded into oblivion.
"In five years I want to be selling out arenas, have a few albums out and a big fan base that respects me… I want my album to connect with the fans. Obviously I'm young and I don't have a huge amount of life experience so I want it to connect with other people. I'm really good at putting myself in other people's shoes. I don't know how, it's just an instinct that I've got."