Famous Last Words is trending now!

So, I just checked my twitter when I saw my friend tweet this:
I am not afraid to walk this world alone honey if you stay you'll be forgiven, nothing you can say can stop me going home #FamousLastWords

I was like "why did she put that hashtag?"
When I saw the Trending Topics section, apparently there is #famouslastwords on the bottom!
I was like W-H-O-A!

But is it My Chem's song that we're talking or just another random TT?
Who did start it?
hm..