Ok, so, turns out that those fotografias are exclusive to olivia-w.com (according to them) and were provided por a much smaller (but still pretty big) fotografia company than companies like WireImage/Getty imagens etc. So I pretty much couldn't find them anywhere else.
The closest things I could find were these 2 behind-the-scenes fotografias from the same photoshoot:
link &
link Sorry I couldn't be of mais help. Maybe someone else has some inside knowledge that will be mais helpful!