You can view Frankie in her bright contrast detail silk shirt here.
You can buy Frankie's shirt here from the Topshop website.
I have blogged about Frankie's shirt before, when Vanessa White wore it in electric blue, and you can view that post here.
For the rest of the girls' outfits in the photos linked above please check the The Saturdays label.
Item image via Topshop.