Question: In how many countries did a song written by Rolf Magnus Joakim Larsson go to the number one spot?
Related documents: [0]  [DOC] "The Final Countdown" is a song by Swedish rock band Europe, released in 1986. Written by Joey Tempest, it was the first single from the band's third studio album, also named "The Final Countdown". The song reached No. 1 in 25 countries, including the United Kingdom, and was certified gold in the United Kingdom in 1986. In the United States the song peaked at No. 8 on the "Billboard" Hot 100 and at No. 18 on the "Billboard" Album Rock Tracks chart. [END] 
[1]  [DOC] 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. He has written hits which include "The Final Countdown", "Rock the Night", "Cherokee" and "Superstitious". [END] 
Answer: 
25
25