The Saturdays star, who gave birth to her son Parker in October, tweeted: "So the juice cleanse begins @Soulmatefood ... I kind of want a mince pie!"
You can do it Frankie!
The 24-year-old singer, who is engaged to footballer Wayne Bridge, is embarking on a cleanse with Soulmatefood.com, who offer either three or five day packages.
The idea is that Frankie will drink lots of juices packed with fresh fruit and vegetables to help kick-start her metabolism, detox her system and start the beginning of a healthier lifestyle.
Frankie happily munched on tasty treats like chips while she was pregnant, so perhaps she has decided it's time to give her body a bit of a cleanse before the festive season gets into full swing!
As for being a new mum, Frankie is taking to it like a duck to water.
She recently shared an adorable picture of her young son and fiance Wayne on Instagram. Too cute!
Got an iPad or iPhone? Reveal Mag is specially designed to fit!