Yay, I got an interview for this week for a place that I like that's close to where I live-

The problem is that it'll be a group interview with maybe 3 other people in it! Yikes! One on one interviews are nerve wracking enough with just one person, at least for me!
How do these interviews work? I might have been to one a very long time ago, so I have no idea what to expect. Would I look desperate or professional if I were to print out copies of my resume?
I'm wearing a dress, and since I'm getting my hair done the day before, I'll look extra sharp-

This is for a major beauty retailer. One time I did apply for a job there and the lady asked me the most difficult questions that I ever had to answer such as how I once handled a difficult situation with a boss or coworker. I don't have any good examples to offer.
So, what can I say that will be believable if this happens again? How do I answer the dreaded tell me about yourself question and what is your greatest weakness? I'm going to google all of this, but any help would be great! Short and vague answers are best for me as I don't have the best memory.
I hope that I get this job as I know that I'd enjoy working at this place. They don't dress in uniforms, just black clothing, and the discounts are generous too-

And I'm a makeup junkie! I need to take two valiums for this interview! I hope that I won't be nervous, and I hope that I get hired for the position that I want the most. I'd rather do stock than cashiering, but beggars can't be choosers!
Wish me luck!