As a happy accident, while dragging yet another orphan image to the trash one day, I hovered over a Google image search which was still open after a vain attempt to discover the source. To my surprise, it's possible to drop images onto the Google image search bar. The results not only consist of the most likely match, but also similar images and sites that have featured it as well. GLORY BE.
Take this crazy dress that I found on Pinterest, sans source. I can't tell if it's darling or hideous. Take a moment to decide.
Right now, this is all I know about Crazy Dress, fondly known as "68891069269664276_Es0fbbEx_c.jpg."
It's by Zuhair Murad!
It's been featured on a ton of other sites!
It's out of my price range! Which is actually okay because I've finally realized how horribly ugly it is, and I feel ashamed for looking at it in the first place.
Alternatively, you can upload the image or paste its URL into Google's search bar. However, I prefer to drag and drop, it's much zippier.
Thanks, Google! This almost makes me forgive you for Google+. Almost.