Wow. You never know how US regime hits new low. People who created those "Islamic" thugs now blaming Iran! After US collapse it will definitely get into Guinness World Records as unprecedented and unbeatable liar.
Th film is "Sadko" (1952). The song is "Polovetsian Dances" from the opera "Prince Igor" (1890) by Alexander Borodin.
I have figured out who is the singer - Yevgenia Sotnikova.