Conversation so far:
What can you tell me about Tarja Turunen's legacy?
Tarja Turunen's voice is described by critics as remarkably powerful and emotional.
What else is said about Tarja Turunen's voice aside from being described by critics as remarkably powerful and emotional?
Sometimes it is stated that Tarja Turunen's voice is too trained or operatic for metal music
What type of style did Tarja Turunen have?
Tarja Turunen had a classical music vocal style that is applied to a metal band
Did anyone of note make any statements about Tarja Turunen and her legacy?
even critics who do not like classical voices admit that Tarja Turunen voice suits the kind of metal songs she sings unusually well
Are there any other interesting aspects about this Tarja Turunen article besides that critics who do not like classical voices admit that her voice suits the kind of metal songs she sings unusually well?
Until the end of their collaboration, Tarja Turunen's singing was a trademark of Nightwish
Did Tarja Turunen win any awards?
Tarja Turunen was nominated for the Finnish Emma Award as Best Soloist of 2006
Did Tarja Turunen perform at any events?
Tarja Turunen was invited by Finnish president Tarja Halonen to celebrate the Finnish Independence Day at the Presidential Palace together with other Finnish celebrities.

Question: What can you tell me about that event?
Self-contained rewrite: What can you tell me about the Finnish Independence Day at the Presidential Palace with Tarja Turunen?