[ALL]
Echo, echo, echo, echo, echo, echo

([Jessica]
Neo gateun namja jjinja cheo miya
Yeojaneun da nikkeoran saenggage)

[Taeyeon]
Neo gateun namja neun cheomiya
Nae mameul seollege hamyeon seodo
Na ppaego dareun yeojal saenggakhae
Modeunge nae nune neun boindago

[Yoona]
Yeoja deureun nikkeoran saenggak
Modu neoreul joha hal georaneun chakgak
[Jessica]
Juwi joheun saram deureun moduda mang gag
Yeogiye jeogiye neoye dalkom han maldeuri

[ALL]
Echo, echo, echo, echo
(Tiffany: Neoye moksori ga nal jakku gwerophijanha like a)
Echo, echo, echo in my mind
(Tiffany: Aereul sseugo inneunde magaboryeo haenneunde like a)

Echo, echo, echo, echo
(Sunny: Nal hyanghan ge aninde babo gachi wae geurae like a)
Echo, echo, echo in my brain
(Sunny: Naege haneun mal gatjanha niga geuman joha jyeotjanha)

[Jessica]
Nunchido eobtneun geon jwe ingeol
Amuri sogeuro man wechyeo bwado
Deulliji anhneun geon beorin geol
Hajiman pogido shipjineun anha
[ Lyrics from: http://www.lyricsmode.com/lyrics/s/snsd/echo.html ]
[Sooyoung]
Jibeul naseomyeon jageop shijak
Jinaganeun yeoja deureun modu myeong jak
[Seohyun]
Geureo daga geollimyeon baro sujak
Yeogiye jeogiye neoye dalkomhan maldeuri 
[ALL]
Echo, echo, echo, echo
(Yuri: Neoye moksori ga nal jakku gwerophijanha like a)
Echo, echo, echo in my mind
(Yuri: Aereul sseugo inneunde maga boryeo haenneunde like a)

Echo, echo, echo, echo
(Taeyeon: Nal hyanghan ge aninde babo gachi wae geurae like a)
Echo, echo, echo in my brain
(Taeyeon: Naege haneun mal gatjanha niga geuman joha jyeotjanha)

[Sunny / Sooyoung] Nawa geuga jaldwe gireul bara shineun bundeureun
[Seohyun / Sunny] Throw your hands up, throw your hands up
[Seohyun / Hyoyeon] Geuga naege hangeo boda jalhae julsu inneun bun
[Seohyun / Sunny] Throw your hands up, throw your hands up

[ALL]
Echo, echo, echo, echo
[Hyoyeon: Neoye moksori ga nal jakku gwerophi janha like a)
Echo, echo, echo in my mind
(Hyoyeon: Aereul sseugo inneunde maga boryeo haenneunde like a)

Echo, echo, echo, echo
(Jessica: Nal hyanghan ge aninde babo gachi wae geurae like a)
Echo, echo, echo in my brain
(Jessica: Naege haneun mal gatjanha niga geuman joha jyeotjanha)

[ALL]
Echo, echo, echo, echo
([Sunny] Neoye moksori ga jakku gwerophijanha)
Echo, echo, echo, echo
([Seohyun] Ibaram dungiya naegedo jom jalhaebwa)
Echo, echo, echo, echo