Hitomi Yoshida made "イェイ!イェイ!イェイ!" available on March 7, 2012. With this song being around four minutes long, at 3:51, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. There is only one song in 「スマイルプリキュア!」主題歌シングル OP:Let’s go!スマイルプリキュア!/ED:イェイ!イェイ!イェイ!【通常盤】, so we believe that "イェイ!イェイ!イェイ!" is a single. In terms of popularity, イェイ!イェイ!イェイ! is currently below average in popularity. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

イェイ!イェイ!イェイ! テンポ

The tempo marking of イェイ!イェイ!イェイ! by Hitomi Yoshida is Andante (at a walking pace), since this song has a tempo of 90 テンポ. With that information, we can conclude that the song has a slow tempo. This song can go great with yoga or pilates. The time signature for this track is 4/4.

イェイ!イェイ!イェイ! キー

This song is in the music key of D♭ Minor. This also means that this song has a camelot key of 12A. So, the perfect camelot match for 12A would be either 12A or 11B. While, a low energy boost can consist of either 12B or 1A. For moderate energy boost, you would use 9A and a high energy boost can either be 2A or 7A. However, if you are looking for a low energy drop, finding a song with a camelot key of 11A would be a great choice. Where 3A would give you a moderate drop, and 10A or 5A would be a high energy drop. Lastly, 3B allows you to change the mood.