Straight off Sesame Street. It's not a bad dress...at first. But it's just so much COLOR and it's worn so OFTEN. Plus, she has no qualms about combining it with her emeralds - both the massive Empress Josephine emerald tiara and the modern Star Wars-esque tiara. I don't mind the color nearly as much with the diamond-only jewelry.
For your birthday, Sonja, I wish you many happy returns and, most of all, many NEW yellow dresses.