Senior pics advice?

I'm getting my senior pictures done next month. I want to buy a few new things for them. Usually people use a cute, casual-fancy dress and a couple of nice shirts/jeans... But I'm at a loss. I really don't know where to start. I'm 5'1", 120lbs, 34C cup, and I have long, red/brown hair. Most of my weight lands in my love handles/tummy area, so I like keeping that covered up. Been told I have great legs, so I don't mind showing those off.
Suggestions, anyone?