"DD(14 in March) told us last night that she would like Imagine Dragon concert tickets for her birthday. I was so relieved because she is so hard to buy for."
The above sentence from the OP is why I interpreted this as a gift. She asked for tickets for her birthday and you were relieved as she is hard to buy for indicated to me that getting her these meant you no longer had to think of what gift to buy. Apparently that is not the right interpretation though.
I truly wasn't being sarcastic when I said that I find it fascinating what people assume about others. It's so difficult to convey tone via written word which takes away so much from the meaning of what you say. When you hear something, your mind automatically fills in the missing pieces for you. That's why it's hard to get an accurate description of a criminal from all the observers, for example. Everyone does it subconsciously.
The tickets will not be her only "gift." She
is difficult to buy for. Thankfully, she has taken up photography as a recent hobby which has inspired some gift ideas. I believe she has an artistic eye and she took the picture I use as my avatar with the camera on her old phone.
She has a ton of jewelry, clothes, and shoes, a recently redecorated bedroom with a new queen size bed, new desk, antique chest, professional vanity case, large tv, dvd player, game system, couch (she has a large room), a refrigerator, and a hammock swing chair hanging from her ceiling, as well as a laptop and a couple of printer/copiers, ipod, iphone 6plus, kindle, new camera, stereo, beats headphones,
Amazon account with money on it, itunes account with money on it, and cash savings. Actually, my relief was that she asked for anything at all. She says feels extremely lucky and doesn't need anything, but she has two sets of grandparents who have been asking for tangible gift ideas for the past month so they can get her something "special."