Song?! (Spoilers)

Great film, saw it at the Barbican Aussie film festival in London, really recommended.

But, does anyone know what the instrumental tune is called towards the end of the film? It starts before she tries to kill herself, runs throughout that scene and ends shortly after. It was real catchy, but i cant find the title anywhere!

...please help...

Donnie: [to his mother] How's it feel to have a wacko for a son?
Rose Darko: It feels wonderful.