Green Day made "21 Guns" available on May 15, 2009. With this song being about 5 minutes long, at 5:21, "21 Guns" by Green Day is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages. There is only one song in 21st Century Breakdown, so we believe that "21 Guns" is a single. The popularity of 21 Guns is currently fairly popular right now. Based on the vibe, this track doesn't seem to be that danceable, however its valence properties can make this some somewhat danceable.
The tempo marking of 21 Guns by Green Day is Vivace (lively and fast), since this song has a tempo of 160 テンポ. With that information, we can conclude that the song has a fast tempo. This song can go great with running. The time signature for this track is 4/4.
This song is in the music key of F Major. This also means that this song has a camelot key of 7B. So, the perfect camelot match for 7B would be either 7B or 8A. While, 8B can give you a low energy boost. For moderate energy boost, you would use 4B and a high energy boost can either be 9B or 2B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 7A or 6B will give you a low energy drop, 10B would be a moderate one, and 5B or 12B would be a high energy drop. Lastly, 4A allows you to change the mood.