for clothes? Hollister!!! =) And Abercrombie and Fitch, but they're kinda overrated. American Eagle has more realistic sizes though...
I am def a fan of vera wang.
I don't have any favorite designers. I always focus on the style and price. Therefore I buy designer brands on sales online. My top 7 websites of designer brands for less . Very often I get on favorable offers. I recommend to try. How do you prefer to buy clothes online or offline?