Hollywood beauty Jennifer Love Hewitt is convinced ghosts exist after an on-set psychic contacted her dead grandmother during a seance. The actress has been getting to grips with the supernatural during the filming of hit US TV show GHOST WHISPERER. The show is based on the lives of spirit guide JAMES VAN PRAAGH and medium Mary Ann Winkowski, and they have been introducing Love Hewitt to the spirit world. She says, "We had an evening with James where he did this thing and my grandmother came through. "She just wanted to say hello and tell me that she was looking out for me. It was really nice."