On August 16, Wendy Rollins, a D.J. at Radio *104.5 in Philadelphia, tweeted and confirmed that new My Chemical Romance material had been sent to stations for airplay consideration. Her tweet, which came well before vocalist Gerard Way's cryptic "Look alive, sunshine" tweet, lists "Na Na Na" and "Sing" as song titles from My Chem's upcoming album.
Also confirming the "Na Na Na" title is an article from Music Mix, which reveals that My Chemical Romance have recorded the song in "Simlish" to be played from virtual jukeboxes in The Sims 3 Late Night expansion pack, which is set for October 26 release.
*Later edited: I had originally made the typo "104.4." I apologize.