Ideas for teen girls please

[LittleEsme]

DD's are 16 and 18.
Can I hear your ideas for their Christmas gifts please!

My Dd will be 15. I've bought her:

Posh brand watch for bargain price of £25 from Vinted (unopened, still in box)
Ariana Grande miniatures perfume set (had a 20% off discount code)
Two piano books - Taylor Swift and Green Day (these were a bit pricey, but she'll use them a lot)
Compact mirror with LEDs (less than a fiver, new on eBay)
Ordered two band t-shirts which haven't arrived yet (fortunately cheap as relatively obscure bands)
Pair of cute socks (with 15% staff discount at work)

Trying not to buy too much 'stuff', so will look for shampoo bar and similar for stocking.