21 guns 

If not the most popular song from Green Day's new album, 21st Century Breakdown, one of them. Was a featured track in Transformers: Revenge of the Fallen.

Other references: 21 gun salute.

You should really listen to 21 Guns by Green Day.

21 guns by worrrddd August 2, 2009

21 guns 

the best song on greenday's album 21st century break down. it is a fucking amazing song and you can suck my balls "Zallomallo" you obviously dont know anything about music and you are a fucking poser who thinks you know what you are talking about.

21 guns is an awesome song.

21 guns by Xx_charlitos_xX March 3, 2011

21 Guns 

On of the worse, yet more popular, songs from Green Day's 21st Century Breakdown.

I like the song 21 Guns

21 Guns by Me47 June 6, 2010