I don’t mean this aggressively at all but what could I have bought her? I really don’t know and I just want to hear your ideas
16 year olds a very difficult to buy for. If your DD is anything like mine, when asked, multiple times, what she'd like for Christmas the reply was "I don't need anything".
I got my 17 year old DD a facial steamer, make up brushes, her favourite perfume, pj's, a Christmas jumper (as she likes to wear a Christmas jumper for a family party on Chritmas night). That's about all in gifts really. She doesn't have the same taste in clothes as me so I gave her a card with some cash to go shopping in the sales.
Her stocking contained nice shampoo, conditioner, bubble bath, bath bomb, chocs, knickers, socks, face mask, impulse, hairbrush and just other small bits really.
Don't feel bad. Just give her some cash (However much you can afford) for the sales. Merry Christmas 🥂🍾