Seven Nation Army song by White Stripes
The Italian fanbase of the Azzurri has adopted the song Seven Nation Army, by White Stripes, as the unofficial song of the team and their triumph over seven teams to win the World Cup.
Francesco Totti is credited with leading the chant of this song during the post game celebration in Rome.
Totti started it
Here is a link to the audio of this song.
Seven Nation Army
White Stripes website