happy song

what song always makes you smile or puts you in a good mood, no matter what the circumstances are or how bad your day is?

bono

Ok, so I feel kinda dumb for asking, but I heard this song the other day and the same question as always popped into my head.

In Switchfoot's song "Gone," the very last lyrics as the song is fading out are:

"Hey Bono i'm glad you asked

Life is still worth living, life is still worth living"

Does anyone know what song that is referring to?  Or was it a press conference Bono held?  I have always wondered that.