I love it when artists do detailed, or funky, wallpaper as backgrounds to their still life paintings! It adds a real sense of environment and mood. As well, it just looks like fun to do, and in the near future I plan to paint something that gives me an excuse to do cool wallpaper in the background. I think the idea of painting something that is already painted (or printed) is ... not sure...breaking the fourth wall?
Ok, so here's a cool artist who uses wallpaper in her paintings! Janet Hill, and here's her shop on Etsy.
I love the giraffes in the bathroom pic!!