Who has performed as a member of more musical groups, Alexi Laiho or Jónsi?
Alexi Laiho: Alexi "Wildchild" Laiho (born Markku Uula Aleksi Laiho; 8 April 1979) is a Finnish guitarist, composer, and vocalist. Alexi Laiho:  He is best known as the lead guitarist, lead vocalist and founding member of the melodic death metal band Children of Bodom, and is also the guitarist for Sinergy and Kylähullut.
i don't know