Frankie Sandford – the scantily clad Saturday

Frankie Sandford was the odd one out at a recent The Saturdays gig.

Wearing matching short skirts in different colours (you know, like they do), Frankie was the only Saturday not to wear a white vest.

Instead she wore a little white crop top while on-stage at the O2 Arena, for the Transformation Trust’s 1st birthday party.

Frankie is getting a bit of a reputation for flashing the flesh – on purpose and by accident.

Frankie performed with bandmates Vanessa White, Rochelle Wiseman and Una Healy – poor Mollie King missed yet another gig due to contracting cellulitis.

All of the girls looked amazing – click here to see photos.