1, 2 Fanclub

is a song covered by Hello, Happy World!

It was one of the challenge songs for the events Hello, My Happy World and Ni Hao♪ Touring the Smile Map.

It is an original song by MikitoP and sung by GUMI and Kagamine Rin.

The full version of the song is included in the album BanG Dream! Girls Band Party! Cover Collection Vol.1. It was released on June 27, 2018. It is also included in the album Garupa Vocaloid Cover Collection, which was released on December 16, 2020.