Shakira’s a survivor … for now. With only one contestant – Sasha Allen – final on her staff on “The Voice,” the famous person used to be concerned that her singer would be cut this week, which would also knock Shakira out of the sport. However as a substitute, Sasha moved into the top six.“I used to be ready for the worst (Tuesday),” Shakira advised TODAY.com after the implications show. “Truthfully, I failed to sleep (Monday) night, th…