Rocking her post-baby bod in a see-through mesh top, Frankie flashed her super toned tum for all to see.
The 25-year-old teamed her sheer top with a black bra underneath and a black mini skirt featuring a drop hem.
Styling her bobbed hair in her trademark sweep to the side and finishing her look with a smoky eye, Frankie looked fabulous as she strutted her stuff on stage.
New mum Frankie gave birth to her baby boy Parker Bridge back in October last year. And although she may be back at work, the Essex born beauty is not going without any baby cuddles that easily.
As The Sats prepare to go on their 'Greatest Hits' tour in September, it seems Frankie and fellow band member Rochelle Humes (mum to 1-year-old Alaia-May) can't bear to be without their little ones and are planning to bring their babies on the road with them.
Despite the tour being labelled 'The Saturdays Greatest Hits', the gorgeous five piece have said they have no intention of splitting.
Frankie has said: "We can't wait to get out on the road and showcase our journey so far...this is not the end, just a milestone along the way."
Yesterday, the girls took to the stage, performing at the Stadium of Light in Sunderland for the first day of music festival, blinkbox music UK Live.
The Saturdays join other artists such as Jessie J, Jason Derulo and Rizzle Kicks and will perform as part of the festival again next weekend in Ipswich (28 June) and Weston-super-Mare (29 June).
For more information on blinkbox music UK Live and for tickets go to www.uklive.co.uk
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Watch The Saturdays' video for 'What About Us' below: