Small gift ideas for 16 yr olds please

[Deminism]

Our babysitter is having a sweet sixteen birthday so we’d like to get her something. I have no idea what 16 yr old girls are into. Any ideas please....

Voucher for perfume, makeup, beauty products?

Wireless headphones? As long as you don't buy Apple ones they can be quite cheap and all the 16 year olds I know spend hours with headphones in their ears.

www.gearbest.com/earphones/pp_009979815073.html?wid=1433363#goodsDetail

Bluetooth speaker?
Nice lip salves eg Burt's Bees
App Store (or whatever) voucher

Something from Lush? They do some nice gift boxes.

PJ's
Fluffy Slippers
Gift Set
Millies Cookie Large with Happy Birthday on

Sterling silver bangle