The singer poses on London Underground

Frankie Sandford couldn’t help messing about during a Tube journey yesterday.

The Saturdays star pulled a funny face and posed for a picture as she made her way down the escalator at a London Underground station.

All the cool kids are doing it,’ Frankie captioned the photo on Instagram.

The 25-year-old looks casual but chic in the snap, wearing a skull top with a khaki jacket and skinny jeans.

The singer also has a pair of glasses perched on her head while gazing up at the camera.

Fans seemed to find Frankie‘s cheeky picture very amusing.

haha i love it!’ one commented.

Another wrote: ‘Well looks like somebody is rocking out .’

SEE PICTURES Frankie Sandford and Wayne Bridge‘s love story in photos

SEE PICTURES Frankie Sandford and The Saturdays launch the annual Royal British Legion Poppy Appeal

SEE PICTURES The JLS boys join Frankie Sandford and The Saturdays for a night out

Anna Francis