The given paper is aimed at investigating acoustic-articulatory relations in producing singing vowels. The study employs the method of electromagnetic articulography (EMA) to obtain exact data on articulatory characteristics in singing. Two types of recording experiments with the use of EMA are conducted involving four trained female singers. They were instructed to sing one of the Russian classical romances with the AG500 sensors attached to their main articulators in the first type of the experiment. The second type supposed reading aloud the text of the same romance. The obtained material (both singing and reading) is annotated and analyzed in terms of the kinematics of articulatory organs in singing as opposed to that in speech. The acoustic-articulatory relation from point of view of intelligibility in singing is considered.