On July 4, 2025, the song "40'S" was released by Ai Milly. 40'S is 2 minutes and 40 seconds long and may contain bad words that may be unsuitable for children. There is only one song in 40'S, so we believe that this song is a single. Based on our statistics, 40'S's popularity is not that popular right now. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.
The tempo marking of 40'S by Ai Milly is Allegro (fast, quick, and bright), since this song has a tempo of 146 BPM. With that information, we can conclude that the song has a fast tempo. This song can go great with jogging or cycling. The time signature for this track is 4/4.
B Major is the music key of this track. This also means that this song has a camelot key of 1B. So, the perfect camelot match for 1B would be either 1B or 2A. While, 2B can give you a low energy boost. For moderate energy boost, you would use 10B and a high energy boost can either be 3B or 8B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 1A or 12B will give you a low energy drop, 4B would be a moderate one, and 11B or 6B would be a high energy drop. Lastly, 10A allows you to change the mood.
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