Song, 33, joined Djibouti membership AS Arta Photo voltaic 7 final November after being launched by Swiss outfit Sion.
He has now captained the north-east African aspect to their first ever top-flight crown.
Arta Photo voltaic beat second-placed AS Port 4-2 final Friday to seal the title with two matches left to play.
Song mentioned: “It is mission achieved, and I’m delighted. Coming right here wasn’t straightforward.
“There are stuff you do not learn about once you arrive in a brand new nation, however thank God it has gone nicely.
“I’m proud for the membership president, who has given me the chance to return right here. He has achieved one thing historic.”
Music made 215 appearances for the Gunners, scoring 10 objectives, after arriving from French membership Bastia in 2006.
Final yr he revealed: “Throughout my total time at Arsenal I could not even save £100,000, whereas individuals thought I have to be a millionaire.
“When Barcelona supplied me a contract, and I noticed how a lot I might earn, I did not assume twice. I felt my spouse and kids must have comfy lives as soon as my profession is over.
“I met Barca’s sporting director, and he advised me I might not get to play many video games.
“However I did not give a f*** – I knew that now I might turn into a millionaire.”
Music helped Barcelona win LaLiga in 2013 earlier than becoming a member of Russians Rubin Kazan.
The Cameroonian additionally had top-flight mortgage spells with Charlton and West Ham.
Capped 49 occasions, Music retired from responsibility with the Indomitable Lions in 2015.
