A quality pair of hair straighteners (ghd or similar)
My DD likes vouchers & money to enjoy some shopping trips with their friends.
My DD is crazy about benefit make-up. Also has her eye on a MAC make-over where they get taught make-up skills.
Pandora ring or pandora voucher to choose her own.
'Selfie' phone case (the illuminated one) extra long charger cable. 'Power pack' to charge phone on the go.
Lush bath bombs (she usually gets a gift box of them at Christmas that lasts her months!)
iTunes voucher to add her favourite songs to her phone. Speaker / docking station.
'Mug cake' mug (I got one from Lakeland) with some fancy baking gadgets and recipe book if she likes baking.
Sketch pad & pencils, watercolours, book on drawing & sketching (if she's arty)
Unusual sweets and candy (I bought some unusual American candy on amazon).