Where is good place to buy a gift for woman in early 20’s in Sb?

I have a friend who is in her early 20’s, and just graduated. It’s her birthday and I’d like to get her a gift but I’m lost on the trends and where to shop for younger people. Any ideas on where to get a fun gift or gift certificate in Sb? Can be anything, clothes, jewelry, kitschy stuff, I just do not ant to be way off base. If you woman in your early to mid 20’s what do you think?