A photo of f(x) as trainees before debut is drawing attention online.

A photo titled 'f(x) In Training Room, Before Debut' was posted on a online community.

In the photo, f(x) members have ribbon hair style with no makeups posing to a camera with cute facial expressions.

Netizens commented "I think their bare face with no make up look better", "They all had endless training times".

Photo: online community