What are the popular brands (lady office/sports shoes, handbags, perfumes, clothes) that you must buy in US?

I am looking forward to travelling to the US and doing some major shopping. However, I am not sure what are the popular brands that one person MUST get in the US which is unavailable elsewhere, such as babyphat, hush puppies (hey i can't find my size in Asia) lady office shoes/boots, etc. Any recommendations? Anything from hipster style, to office or casual wear...