I have yet to come across a picture of Ayumi that I would label "disgusting", but I have seen at least one photo that I feel isn't quite up to par with some other Ayumi photos.
Spoiler:
The one on the left. It isn't a bad photo per se, but the hair, the bandana, the sunglasses, the make up. The text is uber-sweet, though.
Sorry, namiie, I'm secretly in love with who you are, but yeah... I had to post that.