Aa! (あぁ!, Ah!?) is a J-pop group inside Hello! Project, led by Morning Musume member Reina Tanaka. The group itself released only one single.

Notable for the fact that Airi Suzuki was only nine years old at the time of the single, she gives a remarkably professional and competent performance, making her the youngest girl to appear on a Hello! Project single with a major singing part.

Natsuyaki became part of the pre-teen Hello! Project group Berryz Koubou in 2004, while Suzuki joined another Hello! Project group, °C-ute, the year afterward.

In 2004, Tanaka and Suzuki teamed with another Hello! Project Kid, Megumi Murakami, for the song "Suki ni Naccha Ikenai Hito", one of the coupling tracks on the H.P. All Stars All for One & One for All! single. The track is credited to the individual participants, but many fans have informally referred to this grouping as "Aa! Version 2".

The status of the group as a recording unit is unknown, since th...

Aa! (あぁ!, Ah!?) is a J-pop group inside Hello! Project, led by Morning Musume member Reina Tanaka. The group itself released only one single.

Notable for the fact that Airi Suzuki was only nine years old at the time of the single, she gives a remarkably professional and competent performance, making her the youngest girl to appear on a Hello! Project single with a major singing part.

Natsuyaki became part of the pre-teen Hello! Project group Berryz Koubou in 2004, while Suzuki joined another Hello! Project group, °C-ute, the year afterward.

In 2004, Tanaka and Suzuki teamed with another Hello! Project Kid, Megumi Murakami, for the song "Suki ni Naccha Ikenai Hito", one of the coupling tracks on the H.P. All Stars All for One & One for All! single. The track is credited to the individual participants, but many fans have informally referred to this grouping as "Aa! Version 2".

The status of the group as a recording unit is unknown, since they have not released anything since their single in 2003, but the original lineup did "reform" for live performances in 2007.