CP+B Toronto caused quite a stir at lunchtime when it unveiled its stunt for Rethink Breast Cancer. The agency wrote headlines and facts on women's breasts to fuel conversation about the disease. Many of the models were actual breast cancer survivors.

The stunt, which was pulled off in some rather frigid weather, certainly impressed at least one person. Howie Mandel, who was walking by, tweeted it to his thousands of followers -- and took a picture to boot.

The event was to promote Rethink Breast Cancer's annual fundraising event, Boobyball.