Kate Middleton had back-to-back engagements this past weekend and one royal watcher had her eye on a a "mystery."

Kate Middleton has stepped back into the public eye for her first major royal events since completing chemotherapy. And while she made headlines with her surprising millennial look, her bonding with Duchess Sophie and her extremely revealing body language,

Middleton wore a sleek black coat dress pinned with the poppy brooch that has served as a symbol of remembrance since World War One.