Dead or Alive

Ally has been different ever since the day she died, and came back to life. She can now see and talk to her dead brother who she lost at the age of 12. It's not so bad until other ghosts start coming to her and asking her to do favors for them. At first the favors are things like, telling the ghost's families that they loved them, and don't be sad, and move on with your life. Then ghosts start asking her to kill people, but when Ally refuses she finds out that not only can she talk and see ghosts but ghosts can also enter her body and make her do things.