Black house and an enigma

Further east on Laurier street, this brick house is painted black. It seems abandoned, but this curious poster has appeared in its window. It containes a rébus, a word game made with pictures. I tried to figure it out but cannot yet except that I come up with the name of the great French singer Gainsbourg. I will post the rébus later, maybe someone can solve it. To be noted, the picture is not taken in black and white. This is the colour of the house. One can see my hand and camera in the window but I am myself a rébus here in that one cannot quite see me.