12+ Days of sweater vests

Julia, my friend and co-worker, was cleaning out her closet a week back. She found she has at least 12 different sweater vests! I challenged her to wear one every day until she wears them out (pun intended)! So for the next 12+ days I will take a picture of her at the office in the same position, cube and environment. Here's the catch,  we will add, subtract or change something to the picture each day. See if you can tell what's changed! We also placed a bet. Julia thinks someone will say something about wearing sweater vests for 2 weeks straight. I, on the other hand, think we work for a non-confrontational, unfashionable company and therefore no one will say a word to her. A bottle of soda is at stake...