Ready to take the world by storm, the sultry songstress known to audiences as “Petra” crosses effortlessly into the realms of Caribbean music infused with pop, jazz and R&B melodies that places her in the evolving category called “Island Pop.” Born Roshell Petra Hooper, the singer/songwriter who hails from Guyana, South America was raised in Trinidad and Tobago in a family of professional musicians; her mother was a talented singer and her father is the…