CK One launched this campaign in the spring of 2011.  And it was then banned.

The image of Lara Stone in the ‘CK One Box’ carries a subliminal message: “Fuck”. The F spelt in the white space to the left of Lara Stone and the U spelt out by her bra. This was discovered when the image went up onto a billboard in New York and was raising issues with the locals.

Were Calvin Klein really that clever?

Apparently so, Calvin Klein love a banned advert and yet again they succeed!