The group interview was very easy. It had a laidback feel, and most people were wearing Abercrombie-esque clothing, of course. I was in a asmaller group, and ended up being the only girl at my interview. It only took 15 minutes and the questions were not hard at all. Basically, they are looking for super outgoing people, so make sure you respond a lot to your interview, and interact with the people you are with. Also, before I interviewed a girl in the store gave me the advice to make my answers a little lengthy and not one-worded...it worked. They also tried to make it comfortable by throwing in some random personal questions (favorite hang out spots, movies, etc). They do seem to focus a lot on diversity so make sure you go in knowing what it means!
Overall, I had one interview that only lasted 15-20 minutes (in my group of about 5 people) and I got the job, so yay!