'A Girl I Knew' Wigwam & Seija Simola: 'Birthday Day' Info in Finnish on Wigwam and Seija Simola: http://yle.fi/elavaarkisto/?s=s&g=5&ag=72&t=764&a=6483 An archive discovery from December 1969: Wigwam and Eero Koivistoinen present with chanteuse Seija Simola two rock numbers in a psychedelic setting for a "Luola" ("Cave") section of a YLE TV show