Maybe its going for adds at a later date. They need at least 1 song to generate interest in the soundtrack & j. lo song sure as hell isn't gonna do it alone.
Since the song hardly picked up any steam on its own, they probably didn't like its chances and thought promoting it on the radio wasn't worth it, having another Rihanna single just around the corner and all. We'll see where the movie release and video will take it.
There's no point for an adds date after the movie release, really. With radio, it takes time to take effect after all.
I will post it later !! 
