I used random.org to choose the winner for Piggy Paint! Comment #4 -- Denise -- was the winner! She has been contacted via email and has 48 hours to contact me for her gift certificate.
I want to thank Piggy Paint again for providing me with samples and the gift certificate to give away!
As a side note, I had more entries for the last 2 giveaways using Google Forms than I have had for most of my previous giveaways when entries were a public comments. I'm not sure of the psychology behind that, but I'm going to continue using Google Forms for my giveaways!