Former Ogilvy Toronto Co-Chief Creative Officers Janet Kestin and Nancy Vonk share what they learned from global marketer Silvia Lagnado while working together on Dove's "Campaign for Real Beauty."

In search of the right idea for Dove, Silvia was a monster of passion and intensity. She was the purest example of a client who demanded world-class work and meant it. She was as tough as leather -- challenging, judgmental, but as emotional as a child when she was moved by the work. She said, "I want Dove to stand alongside Nike and Apple." And she asked, "What if a bar of soap could change the world?" She was prepared to move mountains to make it happen.

We all want clients with vision and courage. Without Silvia, the "Campaign for Real Beauty" would have been in the shredder. She showed us what's possible when you own your power and use it to its limits. She was on fire to make a difference for women and girls, and never stopped pushing everyone to be bold and committed. A fearless female leader, she was focused on a huge goal and demanded that the whole team share her ambition. If not, get out of her way.

Silvia wasn't democratic. She didn't take no for an answer. The world is a little bit better for that .

See Silvia Lagnado in: Most Influential Women in Advertising: The Groundbreakers