back number's '笑顔' came out on November 21, 2012. With this song being about 5 minutes long, at 4:32, "笑顔" by back number 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. The song is number 7 out of 12 in blues by back number. 笑顔 is average in popularity right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

笑顔 テンポ

The tempo marking of 笑顔 by back number is Adagio (slowly with great expression), since this song has a tempo of 75 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

笑顔 キー

F♯ Major is the music key of this track. This also means that this song has a camelot key of 2B. So, the perfect camelot match for 2B would be either 2B or 3A. While, 3B can give you a low energy boost. For moderate energy boost, you would use 11B and a high energy boost can either be 4B or 9B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 2A or 1B will give you a low energy drop, 5B would be a moderate one, and 12B or 7B would be a high energy drop. Lastly, 11A allows you to change the mood.