[Verse 1]
[Taeyeon] Let’s go! Mwol geokjeonghaneunde neon
Dwaetgo, mwoga tto duryeounde?
[Seohyun] Jaego tto jaeda neujeobeoryeo
Oh oh ooh woh.. oh oh ooh woh....

[Pre-Chorus 1]
[Sunny] Maeil haruga dareuge buranhaejyeo ga
[Yoona] Apseo ga jugil barae geu nugungaga
[Jessica] Neon moreun cheok nuneul gamneun
You bad bad bad boy, you so bad (bad bad bad)

[Chorus]
[All] Deo dangdanghage neon Mr. Mr. ([Yuri] nal bwa)
Mr. Mr. ([Yuri] geurae baro neo neo neo)
Nal gaseum ttwige han Mr. Mr. ([Tiffany] choegoui namja)
Mr. Mr. ([Tiffany] geuge baro neo)

[Post-Chorus]
[Taeyeon] Sangcheoro kkaejin yurijogakdo
Byeori doeneun neo Mr. Mr. Mr. Mr
[Tiffany] Nareul bitnaejul [Seohyun] seontaek badeun ja!
[Tiffany/Seohyun] Geuge baro neo Mr. Mr

(Mr. Mr. Mr. Mr. Mr. Mr. Mr. Mr.)
[Verse 2]
[Jessica] Wae neon ajikdo mitji motae?
Jinjja! bimireul allyeojulge
[Tiffany] Neon wae teukbyeolhan Mr.Inji
Oh oh ooh woh.. oh oh ooh woh

[Pre-Chorus 2]
[Sunny] Mirael yeoneun yeolsoe baro niga gajin geol
[Sooyoung] Sonyeonboda deo keun kkumeul kkeureoana
[Yuri] Bitnan nun sok nal damgoseo
My mi, mi, mister, rock this world (world world world)

[Chorus]
[All] Deo dangdanghage neon Mr. Mr. ([Hyoyeon] nal bwa)
Mr. Mr. ([Hyoyeon] geurae baro neo neo neo)
Nal gaseum ttwige han Mr. Mr. ([Sunny] choegoui namja)
Mr. Mr. ([Sunny] geuge baro neo)

[Post-Chorus]
[Tiffany] Sangcheoro kkaejin yurijogakdo
Byeori doeneun neo Mr. Mr. Mr. Mr
[Jessica] Nareul bitnaejul [Sunny] seontaek badeun ja!
[Jessica/Sunny] Geuge baro neo Mr. Mr

[Break]
(1. 2. 3. 4.)
(Hey.. Hey.. Hey.. Hey..)
([Sooyoung] Mr. Mr. Mr. Mr.)
(Hey.. Hey.. Hey..)
[Sooyoung] Wooh!
[Bridge]
([Yoona] Jigeum sesang ane) [Taeyeon] oh, ne ape
([Yoona] Nuguboda meonjeo) [Taeyeon] neol deonjyeo
([Sooyoung] Deo chiyeolhage) [Taeyeon] deo chiyeolhage
([Sooyoung] Mr. Mr.) [Taeyeon] mister
([Hyoyeon/Yuri] Ojik geudaemani) [Tiffany] irwonael
([Hyoyeon] Dan hana) [Tiffany] naeil apui neo
([Hyoyeon/Yuri] Geu ane sara gal neowa na) [Tiffany] mister~ oh~

[Chorus]
[All] Deo dangdanghage neon Mr. Mr. ([Jessica] nal bwa)
Mr. Mr. ([Jessica] geurae baro neo neo neo)
Nal gaseum ttwige han Mr. Mr. ([Hyoyeon] choegoui namja)
Mr. Mr. ([Hyoyeon] geuge baro neo)

[Post-Chorus]
[Seohyun] Sangcheoro kkaejin yurijogakdo
Byeori doeneun neo Mr. Mr. Mr. Mr
[Taeyeon] Nareul bitnaejul choegoui namja!
Geuge baro neo Mr. Mr. (Mr. Mr.)