Read our article here: http://www.mousesteps.com/movie-revie... John Ford Murphy, the director and songwriter of the lovely Pixar short Lava, sings part of the title song.LAVA plays ahead of the film Inside Out. We attended a press conference in Beverly Hills, where both films were discussed at length.ead our article here: http://www.mousesteps.com/movie-revie... John Ford Murphy, the director and songwriter of the lovely Pixar short Lava, sings part of the title song.