The 24-year-old Cameroon international will now travel to the Nou Camp to agree personal terms and undergo a medical, Arsenal announced in a statement on their website.
Barcelona confirmed in a statement the fee for Song will be 19million euros (£15million).
England will debut their new away jersey against Brazil at the Maracana Stadium on Sunday. Get in the Gear
The Nike Hypervenom is the latest cleat silo from Nike. It will change your game and is worn by the game's top players.
The USA will wear their blue away jersey against Jamaica in their World Cup qualifier on Friday night.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
Support the USA national team with an official 2013 Centennial soccer jersey from Nike. Its Official.
Barcelona will wear this new home soccer jersey next season. They also have a new away jersey. Get them both.
The hoop soccer jersey is classic and cool. The USA hooped jersey is perfect for every fan. Get in the Gear.
Neymar's move from Santos to Barcelona is no doubt the biggest summer transfer.
Germany is one of the top teams ever and they will play the US on Sunday.
Manchester City will try and win back the Premier League title with this new soccer jersey from Nike!