The Saturdays are performing tonight (February 19) at Oxford's New Theatre, but according to fans at the gig are minus a member. 

One fifth of the girl group, Mollie King, hasn't joined the 'Higher' stars on stage this evening and her absence has made the top ten UK trending topics on Twitter. 

Nothing official has been confirmed about tonight's show, but fans at the concert are inundating the social networking site with get well messages and tweets to say they miss her in the line up. You can watch the latest installment of their 'Behind The Headlines' tour diary below: