This a two part sweater: from the back it looks like two layers - one longer then the other, and from the front it looks like anda are wearing a strapless bahagian, atas and a sweater on bahagian, atas of it . link
foto
sweater
bahagian, atas
This Teen Fashion foto contains
cardigan.
There might also be
pullover, slipover, sweater, and pelompat.