What is the name of the song? "girl we'll set the world on fire, woah, woah, woah, oh"
We are young.
If you mean the song that says "we're gonna set this world on fire..woah oh woah oh oh oh" then it's called Set This World on Fire. It has been sung by "The Janoskians". You can get its lyrics online at http://www.metrolyrics.com/set-this-world-on-fire-lyrics-the-janoskians.html.