f(x) is the first group to release a song for SM's 'Winter Garden'

After announcing that SM will be releasing their winter project single 'Winter Garden', it has now been revealed that f(x) will be the first group to release their song.

The title is yet to be revealed but f(x)'s song will be released on December 15.

Aside from f(x), it has been revealed that Red Velvet and BoA are participating in this special project as well.  Stay tuned for more details.