At 20, Sarah Ross is being called upon to forge the trail for women in the fast-growing country/rap/hip hop genre of music. The New Jersey native is no stranger to forging country music lyrics with a hip hop beat. With encouragement from her mother, the innovative singer has been melding two of her favorite genres since she was 16. Signed to Average Joes Entertainment after label head, Shannon Houchins, saw her on “American Idol” and looked up her videos on the Internet.