How often do you have your breasts checked out?
In the ad, which was posted to YouTube last week, a woman attaches a hidden camera to her bra and wears her sweater in a revealing way.
The video then keeps score of the number of people who look at her breasts.
At the end, it asks, "When was the last time you checked your own?"
The ad was released just before the start of Breast Cancer Awareness Month, a period in which women are reminded to have screenings.
The Breast Cancer Society of Canada points out that women have an 88 per cent survival rate due to advances in screening and treatment.
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