[Taeyeon] Action Chain reaction-action Chain reaction-action
[Taeyeon] Yasashiku sa reruto chotto, yasashiku naru no
[Jessica] Fuan'na me o sa reruto (sa reruto) fuan ni naru no
[Tiffany] Dandan You're Loving Me, dandan I'm Loving You
Rensa shite ku kanjō no rarī
[Sooyoung] Ichiga+Ichiga ga 2 ni naru kankei
Nanka ja manzoku dekinai dakara
[Yoona] Tōshindai yori choppiri
Ōkina ai tewatashi de kakezan-chū
[All] Baby Ding-Dong hirogaru Chain Reaction
Uketotta ai de Ch-Changing My Mind
Kara sashidashu ai de Ch-Changing Your Mind
[Jessica] Ai ga ai o yobu Chain Reaction
[Seohyun] Sunao na omoi o kiku to, sunao ni naru no
[Sunny] Kakehiki wa shinaide, zuru kashikoku natchau
[Taeyeon] Dandan You're Loving Me, dandan I'm Loving You
Eien no kanjō no rarī
[Yuri] Itsuka sekai mo kaete shimau wa
Anata no hāto janainara
[Hyoyeon] Tōshindai yori choppiri
Ōkina ai rī shite kakezan-chū
[All] Baby Ding-Dong hirogaru Chain Reaction
Uketotta ai de Ch-Changing My Mind
Kara sashidashu ai de Ch-Changing Your Mind
[Tiffany] Ai ga ai o yobu Chain Reaction
[Jessica] Oh~ oh Chain Reaction oh oh
[Sooyoung] Tebanasu yūki no nai ([Sunny] Oh Baby)
[Yoona] Semai kokoro ni ([Sunny] Are You Ready?)
[Taeyeon] Shimaeru saizu no shiawase wa chīsai
[Yuri] Hito kara hito e
[Tiffany] Love to iu nano Virus ga
[Seohyun] Densen shite All Over The World-
[Jessica/Hyoyeon] Sō wa ra Hito kara
[Jessica] Hito kara hito kara hito e~
[All] Baby Ding-Dong hirogaru Chain Reaction
Uketotta ai de Ch-Changing My Mind
Kara sashidashu ai de Ch-Changing Your Mind
Ai ga ai o yobu Chain Reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
[Taeyeon] Chain reaction, [Tiffany] oh~ the chain reaction
