Should a person who has become religiously guided send cartoon American songs that he had promised to export to someone before his guidance?

Singing and music are forbidden by the Qur'an, the Sunnah (definition), and what has been narrated from the Salaf. Everything that is forbidden, its buying, selling, trading, and aiding in it are also forbidden. Among aiding in what is forbidden is exporting and sending it, for Allah تعالى says: (And cooperate in righteousness and piety, but do not cooperate in sin and aggression). It is obligatory to refrain from sending forbidden tapes and to inform their owner of the reason.