Actually I stumbled into it on ad-rag.com they have a pretty extensive commercial archive, but it's by product (like Pantene or Garnier) not by acress/model (like Brooke Shields) or by keywords (like shampoo or hair)

That one just happened to be a random ad so I nabbed it and placed it here. I had never heard of Lux until I saw this ad and I only knew it had Brooke in it becasue I saw the thumbnail. Serendipity.