Adele is wearing a cold shoulder 60's style prom dress in gold and black. The dress has gold shoulder straps and velcros in the back.
Barbie Clothes - Gold & Black Prom Dress
Note that the dolls and stands are not included.
Clothes and shoes fit Barbie and other similar 29-30cm (11.5 inch) dolls like the Anko fashion dolls and Sparkle Girlz.