there are 3 movies-barbie:mariposa and the fairy princess(2013),barbie and her sisters in a pony tale(2013) and barbie:pearl of the sea(2014).for more information ,refer wikipedia.
Her name is Heavynn gates and she's the lead vocalist for the title song of the upcoming fall 2013 barbie movie "barbie and her sisters in a ponytale". She has her own band called "Fairfax" and you can listen to some of her songs on this site!