ELTON FEARS SUN IS GOING DOWN ON BRITNEY!

Tries to save twisted dancer from brain melt

After watching his stressed-out friend Britney Spears unravel, Elton John is zooming to her side like a rocket in a desperate bid to save the troubled Toxic songbird before it’s too late, say sources.

Insiders dish Britney’s life seems balanced on a razor’s edge after her shocking dancing videos have become increasingly bizarre — with the latest including dangerous and terrifying knife play that resulted in the police rushing to her L.A. home for a Sept. 27 welfare check.