|Associated Acts||Elder Club, Morning Musume, Berryz Koubou, ℃-ute, W, v-u-den, Mano Erina, THE Possible, S/mileage, Hello Pro Egg|
Wonderful Hearts (ワンダフルハーツ) was a Hello! Project concert group. Since 2006, Hello! Project had been split into Wonderful Hearts and the Elder Club, but Wonderful Hearts was the only remaining unit upon the graduation of Elder Club on March 31, 2009.
Hello Pro Kenshuusei usually appear with Wonderful Hearts as backup dancers.
As of January 2010, Wonderful Hearts has been disbanded as a concert unit due to the creation of Hello! Project Mobekimasu.
- Morning Musume
- Berryz Koubou
- Mano Erina
- Hello Pro Kenshuusei
- 1st Gen: Korenaga Miki, Noto Arisa, Aoki Erina, Tanaka Anri, Sengoku Minami, Sawada Yuri, Muto Mika, Hashida Mirei, Furukawa Konatsu, Sainen Mia, Mori Saki, Yutoku Ayumi, Kitahara Sayaka, Sezaki Azusa, Saho Akari, Sekine Azusa, Okai Asuna, Maeda Irori, Arai Manami
- 2nd Gen: Ogura Manami, Komine Momoka
- 3rd Gen: Kikkawa Yuu
- 4th Gen: Fukumura Mizuki, Kaneko Rie, Takeuchi Akari
- 5th Gen: Miyamoto Karin
- 6th Gen: Sato Ayano
- 7th Gen: Hirano Tomomi, Katsuta Rina
- 8th Gen: Takagi Sayuki
- 9th Gen: Tanabe Nanami
- THE Possible