Why does Lionel Messi 'eat just one' in new Lay's chips commercial?

Lay’s recently signed Lionel Messi for a major global marketing campaign.

And a new TV commercial features Messi walking through city streets while fans throng to his side for a selfie. But at what cost?

Find out why only Lionel Messi can eat just one in this funny commercial.

http://youtu.be/90bFXuFwLJs