I'm weird. I think the new dinosaur scientists are calling the "Chicken from Hell" is actually kinda cute - check it out here: http://www.scmp.com/news/world/article/1453331/new-breed-dinosaur-dubbed-chicken-hell-discovered-us-researchers
It has a beak, feathers, hollow bones and a cassowary-like crest. Which makes me wonder - why would a flightless dinosaur have hollow bones? Did they really evolve for a reason other than flight or did this thing try flying and give it up?
Either way - it's a good candidate for Stupidest Looking Monster and/or "So ugly it's cute."