What should I get my estranged stepsister for Christmas?

We've never gotten along since our parents got married but I always get her a Christmas present out of politeness. What should I get her? She's one of those want to be preppies (you know the kind; the ones that think hollister and abercrombie are preppy and have never heard of vineyard vines or ck bradley) and she is 21. I always get her something because I feel bad when she is the only person in the house I haven't bought a present for