In how many countries did a song written by Rolf Magnus Joakim Larsson go to the number one spot?
Joey Tempest: Rolf Magnus Joakim Larsson (born 19 August 1963), better known as Joey Tempest, is a Swedish singer, lead singer, and main songwriter of the rock band Europe. The Final Countdown (song): "The Final Countdown" is a song by Swedish rock band Europe, released in 1986. The Final Countdown (song):  Written by Joey Tempest, it was the first single from the band's third studio album, also named "The Final Countdown". The Final Countdown (song):  The song reached No. 1 in 25 countries, including the United Kingdom, and was certified gold in the United Kingdom in 1986.
25