I know I just did one of these, but I came upon the work of Jenny Bowers today and had to post. I love her colorful layered illustrations. Her line work has so much personality, and I love how mixed the media is for many of her pieces. Makes me want to break out the crayons, tissue paper, and magic markers. It seems like she does work for a lot of big time clients, and I can certainly see why! Her stuff is just oh so great & unique.
Also have fun looking through all these other illustration portfolios through Illustration Division. So much good stuff!