Justin Billingsley has one hell of a Lego set.

Publicis Groupe's first global chief marketing officer used the famed building blocks in an analogy during the Ad Age Ad Lib podcast to explain how the holding company's Power of One works for clients. Billingsley said that for client Mercedes-Benz the company constructed a shop, Publicis Emil, composed of 650 people in 39 countries customized specifically to the automaker's needs.