When the song does not end

When the song does not end (Russian: "Когда песня не кончается") is a 1964 Soviet musical film-revue, directed by Roman Tikhomirov and produced by the Leningrad Film Studio. It features music by Andrey Petrov, Georgi Portnov, Vasily Solovyov-Sedoi, Viktor Fyodorov, and Georgy Firtich. Among other things, it is notable for being Edita Piekha's screen début.
Synopsis.
During the Leningrad summer music festival, a young police lieutenant falls in love with Svetlana, a beautiful singer. Meanwhile, reporters Kostya and Bob do their best to document the various musical performances.