I don't remember much of it as I was watching with a friend sometime ago. The plot included a girl who was killed/kidnapped or missing. There was also a boy who had something like a Teddy bear which he spoke with and the bear would talk to him, and at some point another boy tries to kiss this kid. I don't remember much else but I always wanted to know the name of the movie.
Might this be A. I. Artificial Intelligence? It features a robot child who has a talking robotic teddy bear. The boy is initially created as a temporary replacement for a couple's critically ill child, who has been placed in suspended animation. (The frozen child is a son, not a daughter, though.)