Ke$ha‘s new hit “Die Young” has fallen on deaf ears … after radio stations around the country yanked the song from their rotation after the Newtown tragedy … TMZ has learned.

“Die Young” clocked in at #3 on the radio playlists on Friday (the day of the shooting) … reaching 167 million listeners nationwide, this according to Mediabase, a company that tracks radio airplay.

By Saturday, the day after the shooting … airplay dropped by 3 million listeners … a sign that stations were slowly pulling the song off the air.

By Monday … “Die Young” took a huge hit on the radio … dropping down to 148 million listeners … a 19 million drop from what had been a pretty steady rotation before the shooting.

One music expert tells us … a drop of this magnitude is extremely rare. The last time a song plummeted this quickly is when the Dixie Chicks were banned from country radio … after insulting President Bush.

We reached out to Ke$ha for comment — so far , no word back.