Watercolor and acrylic gel medium on Arches CP 140lb, 9x12". Interesting thing: Arches paper seems much softer after Canson Montval, much more absorbing (less sizing??) and more difficult to wipe or scrub paint off of.
The reference photo is Kate Larmuth of Julia Kay's Portrait Party.
Oh. And this was not a 30 minute painting, as you can probably tell.