The new mum posted a cute photo of herself exercising at home while carrying newborn Parker safely in a baby carrier.
"Finally found a way to make working out enjoyable!" wrote Frankie next to the picture. "#everybodyneedsaparker."
Frankie, who is due to re-join her band The Saturdays on tour in 2014, is clearly keen to get back into her pre-baby shape before the energetic concerts begin again.
In another Instagram picture 24-year-old Frankie showed off a charming Scrabble-themed wall decoration of her family's interlinking names.
Frankie and her footballer fiancé, Wayne Bridge's names are crossed with Parker and Jaydon who is Wayne's seven-year-old son from his relationship with French model Vanessa Perronce.
"How cute is this?!" said Frankie. "Now all my preggo friends know what they're getting! #family."
Frankie and Wayne welcomed baby Parker on 18 October and shared the first picture of their bundle of joy a month later.
The singer tweeted a snap of the couple planting a kiss on Parker's head accompanied with the caption "So much love".