The former TOWIE star hit the gym first thing on Wednesday morning (31 December), shortly after she introduced fans to Celebrity Training with Sam Faiers.
Sam's online tutorials are designed to offer exercise and nutrition advice for fans, with a focus on health and wellbeing.
She told Mail Online: "My motivation is to show that you can keep your body in a healthy and strong place. This is far more important than what size you are. It's about how you feel.'
Sam said that being diagnosed with Crohn's Disease earlier this year had made her more determined to stay healthy and fit.
And Sam's so dedicated she didn't even give herself a day off on her own birthday!
Sam tweeted: "One last #toning session of 2014! Starting the #January fitness early. @CelebTrainSam x."
We're pretty sure her big sister Billie Faiers, however, will have plenty of fun planned for later today as the girls combine Sam's birthday celebrations with New Year's Eve.
Billie tweeted: "Happy birthday to my beautiful sister @SamanthaFaiers your mine and Nelly's best friend,we love you so much and can't wait for today."
Happy birthday, Sam!
Meanwhile, Sam's former TOWIE co-star Lucy Mecklenburgh has announced she's releasing a fitness and nutrition book tomorrow called Be Body Beautiful. Lucy is already the owner of successful fitness website Results with Lucy.
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