Lyrics of Slo-mo death blow

I never really got the plot from the first rushes to the closing shots. since when were you the budding actress? it's in your small talk and it's on your mattress. it was halfway through the bathroom scene when it became clear you'd be coming clean. thought i'd always have a place in your heart instead of being just another walk on part.
Slo-mo death blow that only leaves the final curtain; end of the show - there'll be no encore that's for certain.
There was a star up in the sky and when it shone on me it burnt my eyes. now all my dreams are turning to dust, my shining star is lying covered in rust.
(chorus)