Advertisement error?

I have walked past this pillars a million times. They seemed normal to me. However, a few days ago, I walked past the pillar for the 2373748547th time and one of my family member started to stare at the advertisement on it. Puzzled, I asked whats wrong? She then pointed at the model of the advertisement.

I took a closer look and found nothing wrong with the poster. She then pointed at her tummy.

After a closer inspection, I knew whats wrong with the picture. Apparently, the model has a little extra flesh at her stomach. Its really quite normal if the advertisement was not used for a fitness centre. I mean, who doesnt have extra flesh? I think that fitness centre should hire a more observant photographer/photoshopper.

*Its all my own judgement, intepretation and opinion. Dont take me seriously*