Tinashe.The pop star sizzles in the sand in the Sports Illustrated Swimsuit Issue that hit newsstands in July, fulfilling her dream of being one of the annual edition’s bikini babes.“I was probably 12 or 13 years old and being like, ‘One day I’m going to be in a swimsuit edition of Sports Illustrated,” Tinashe, 28, told The Post, adding that she’s a huge fan of veteran cover girl Tyra Banks.