Teenager in the House

My friend's 13-year-old daughter doesn't want to be treated like a baby anymore but is looking for more adult style for her bed corner.

Visited a furniture shop and chose these cool mature sheets. After the bedding is in order, renovated and decorated the rest of the room. Her wish was not to have anything too childish but get wallpapers that are (like teens say) "both stylish and modish”.

What do you think of this room?