Renato Zero Renato Zero participated in the Sanremo Music Festival with the song "Spalle al muro", and from that moment on his career began to rise again. In 1993 he ranked #1 on the Italian charts with the LP "Quando non sei più nessuno". The following year "L'imperfetto" repeated this success. His concerts would regularly sell out, and he returned to his famous dress changes, although in a more balanced style. In the mid-1990s Zero dubbed the character of Jack Skellington and sang the songs in the Italian release of Tim Burton's motion picture "The Nightmare Before Christmas". In 1999, he sang
The Nightmare Before Christmas asked on Burton's involvement, Selick claimed, "I don't want to take away from Tim, but he was not in San Francisco when we made it. He came up five times over two years, and spent no more than eight or ten days in total." Walt Disney Feature Animation contributed with some use of second-layering traditional animation. Burton found production somewhat difficult because he was directing "Batman Returns" and in pre-production of "Ed Wood". The filmmakers constructed 227 puppets to represent the characters in the movie, with Jack Skellington having "around four hundred heads", allowing the expression of every possible emotion.