While Barcelona are in their toughest run of form in recent memory, he can do nothing to contribute, watching from the bench.
Song left with dreams of playing in El Clasico, and so far they remain just that. Dreams.
In the three matches between Barcelona and Real Madrid this season, Song has not played a single minute.
For a player the club spent £15 million on in the summer, you might imagine they would want to involve him more this season, but he remains a 'B' player, wheeled out for the less important games.
He has made just three appearances in 2013, against Sevilla, Osasuna and Getafe, with the Osasuna game only a 15 minute cameo.
In the Champions League Song has made four appearances, one as substitute, including a start in the ignominious 1-0 loss to Celtic.
So it's fair to say it hasn't quite gone according to plan for the Cameroonian.
He has one goal, scored against Zaragoza back in November, and he did impress in the recent win over Getafe in mid-February, but when Barcelona host AC Milan in their do-or-die Champions League second leg next week it would be a surprise to see him feature.
For every Fabregas there is an Alex Hleb, a real failure at the Catalan club, and Song will want to stick around to ensure his spell in Spain is not viewed in the same way.
He has a lot of work to do. In late December, readers of Spanish newspaper Marca voted him 'flop of the year' alongside former Spurs midfielder Luka Modric.
PSG have been linked with making a summer bid for him, and with Arsenal still needing a defensive midfielder to replace Song, who knows, there could be a shock return in the offing, as unlikely as it sounds.
Arsenal fans are you surprised by Song's lack of success in Barcelona?
image: © Ronnie Macdonald