Yes, I do sing but not on that level. I know nothing more of those three ladies than what the Internet tells about them.
Sirkka Parviainen has studied singing in London and Karlsruhe besides graduating from Sibelius Academy (the Finnish music university). She has won singing competitions both in Finland and abroad and has performed as a visiting artist in many operas as well as giving concerts around Europe. She also seems to have a good sense of humour judging by her
contribution to the Finnish Broadcasting Company's humorous "Shower singing competition".
Johanna Tuomi has her very own page in the Finnish Wikipedia, and that page tells she is a professional opera singer whose broad repertoire also includes operetta, gospel and jazz. She has graduated from Sibelius Academy as both singer and music teacher, worked in the Finnish national opera in the 80's, done a myriad of both opera and operetta roles around Finland, sung in the premieres of many Finnish operas and given concerts around Europe. She's been teaching solo singing in Sibelius Academy since 1994.
Of Sirkku Wahlroos-Kaitila the web told very little. Just that she has made a long career as singing teacher in the Sibelius Academy and is also the senior singing teacher in Helsinki conservatory and that she is at present the teacher of at least one professional Finnish opera singer. I also found an old interview in which she states that music is a form of communication so a singer needs to understand the character of each language used, that singing needs some purely physical fitness and a good breathing technique as it's basis and that singing lessons are very personal situations where the teacher must be very responsive to be able to find the best qualities of the student and the best "clang" of the student's voice.
