Search: jonsi
Why: I just saw it. I know that song, wink.
Answer: "Go Do" by Jónsi (the lead singer of Sigur Ros, durr)! It's from his solo album Go, which is very good airplane music. Buy it here on iTunes!
Source: Amazon
The More You Know: Most of these lyrics happen to be in English, so here are the ones you might be looking fo:
Go sing too loud
Make your voice break - sing it out
Go scream, do shout
Make an earthquake
You will survive, will never stop wonders
You and sunrise will never fall under
