"Idiot"'s a little harsh, isn't it? ;-) To be fair, I look at paparazzi shots of Amy Winehouse all the time and have not noticed this tattoo before (as I say: I "for one" was previously unaware of it - I was simply being honest). Looking back through pictures, even when she's scantily dressed, she's usually wearing a vest top and/or her hair down, both of which usually cover up this part of her. I think I'm backed up by the picture agency, too, who zoomed in on this themselves - something which they do on photographs which show off something not normally or previously visible on a celeb (eg a tattoo, an engagement ring).

You idiot, that tattoo is visible in every photograph of the girl.