Sikora is credited with being the first Soviet artist to have started performing international jazz, swing and pop standards in their respective original languages.

At the age of five she started studying the piano and four years later was able to accompany her father on a professional level, first at home, then with her own solo program at the local Pioneers' Palace and the City's Theatre.

A self-styled proponent of what later became known as the 'Theatre of Song', the girl was spotted in Baku by an established pianist, composer and conductor Alexander Tsfasman who invited her to join his own musical collective.

In May 1941 she debuted as a singer of the Tsfasman-led Soviet Radio Jazz Orchestra at the All-Union Agricultural Exhibition's Green Theatre in Moscow.

She took part in the 2nd All-Union Competition of Soviet Popular Music Performers (the first one in 1940 brought Klavdya Shulzhenko into the spotlight) and won the 1st prize.

[2] In 1947 the Radio Jazz Orchestra disbanded and, as Tsfasman became the director of the Moscow Hermitage Theatre, Sikora joined its Sympho-Jazz band.

Established composers like Nikita Bogoslovsky, Matvey Blanter, Mark Fradkin, Vano Muradeli and Kirill Molchanov were now writing the originals for her.

Then in February 1993 music historian and writer Valery Safoshkin organized the Ruzhena Sikora special concert at the Moscow Central House of Artists.

In the finale of this highly successful show the legendary performer Izabella Yuryeva rose on stage to present the bouquet of flowers to Ruzhena Sikora.