one of those rarest eras where the stylist gave justice to Wendy's outfit.

Hands down to a group who have guts to cover this song.

RBB: proof that you don't need awards to be great.

Irene’s high note though!!! It was fabulous

This masterpiece doesn't deserve all these disrespects. Pure Bop.

I don’t understand how ppl didn’t like this song that much. Like harmonies, the rap AND Wendy’s high note at the end?

The song with so many challenging vocal technique yet underappreciated. Wendy eats this song up with her high level of vocal technique. Vocal runs at the end is very difficult, most parts either. Not to mention the harmonisation, seulgi + joy adlibs, irene's whistle notes, and yeri harmonies. I doubt other girl groups can sing this song beautifully like Red Velvet, however, Girls Generation seems also be able to slay this song.

its October guys, y'all know what that means now....

Bad Boy Really Bad Boy 🤝 Seulgi's iconic Red Pants

Who ever their stylist was needs a raise , this era was the best (including psycho) in terms of styling

I can't believe that people didn't pay much attention to this masterpiece. But raise your hand if this is your favorite song of Red Velvet.

it’s crazy how ppl think that this song is their worst title track bc i honestly think it’s their best lmaoo 😭🤚

A song with 90 percent adlibs and high notes. Queens did that

Teacher: okay class lets count 1 2 3 4 5 Joy:1 2 5 Thank u joy

Unpopular opinion: this is one of Red Velvet's best song Edit: Thank You for the likes guys, hope u guys be safe :)

Gonna loop this and Peek-A-Boo this spooky season. We need the queens to come back...

Sbs is a really bad boy

One of their most stylistically unique songs and most powerful when it comes to vocals. Y'all didn't appreciate this enough.

Irene : '' who dat who dat who dat boi '' also Irene : '' *scream* he's a Really Bad Boy ''

RBB is just so RICH. The music was composed with a lot of different lays of vocals that complements each other. There are so much power and harmonizing. And the old vibe that brings to us??? MASTERPIECE.

Red Velvet has two moods: Summer and Halloween

Joy: *gets bitten by a wolf* Joy’s reaction: 😧

That one is Crazy af -the adlibs - they Sing almost the ENTIRE instrumental -Irene(main rapper) reaching the D5 high note(highest note recorded in kpop)

Wendy's high notes and Irene's whistles are literally the best..

i don't understand why so many people hate this era? this song is iconic just like the whole album.

Seulgi with blond hair is the only thing I needed in life

This song really deserves a wins, my favorite title track from them.

Red Velvet really said "even our 'weakest' vocalists are better than all y'all" This song is so amazing, I don't and will never understand how it has no wins

Summer doesn't start until Red Velvet say so.

The first one : bad boy The second one : really bad boy Later : the baddest boy

red velvet u will forever be famous

Will never forgive y'all for not giving them any wins for RBB, she aged like fine wine

Fun fact : RBB is Red Velvet’s first #1 song on Billboard’s World Digital Song Sales Chart 🐺

this song is underappreciated because u will not like it the first time u hear it. but after several listening, u'll realize that this song deserves the same hype along with 'bad boy' and 'psycho'

ppl who hate this song just doesn’t know how magical irene saying “you’re a bad boy and you’re bad for me” is

This is probably the hardest RV's song imo. The lyrics density, the high notes, the choreography. Other groups would probably rip their vocal cords doing this song

This song should have been in Hotel Transylvania. Edit: Thank you for two thousand likes!!

An underrated MASTERPIECE!

This one of the MOST underrated kpop song like tbh there's nothing that u can't like in this song and imo this is one of the best songs from red velvet

the vocal power in this song is mind-blowing

One of the reasons why I Stan Red Velvet is because of the many different genres and concepts they do. And they Rock every single concept and genre they do

The HIGH NOTES 🎶🤌💅

Title: Really Bad Boy Alternative Title: Red Velvet flexing their amazing vocals for 3 mins straight.

Joy: 1,2,5 Me:No joy that's not how it work- Seulgi: 1,1,1,1,1 Me:NOOOO

i will NEVER understand why this mv doesnt have 100m vi3ws...

not ReVe being the werewolf 😭😭🤣

Can't wait to see Wendy join the girls on stage.

Yeri looks so so so amazing I’m not even exaggerating

Red velvet has three moods: Summer Halloween and Lesbian Cult

하 할로윈만 되면 RBB 생각남 진짜 명곡이야... 사운드가 말도안되게 풍부함

I was actually worried this might sound like bad boy when I heard the title was going to be really bad boy. But hey, this song is unique on its own and I love how RV and SM didn’t use Bad Boy’s popularity to make another song similar to it. They make their own trend and I really like that they take risks!!! Stan RV!!!

When it's umpah umpah era but your still not done with RBB and zimzalabim....

Unpopular opinion: RBB is one of the best Red Velvet eras.

RBB IS AN UNDERRATED MASTERPIECE

Don't worry, you're not the only one trying to follow and scream along with that beautiful whistle note HAHAHA Irene, my Baeby.

I just notice how Red Velvet releases music since they started coming back thrice a year. Peek-a-boo/Bad boy- for International fans (Velvet concept) Red Flavor/Power Up- for Korean fans (Red concept) Rookie/RBB- experimental songs that showcases more of what makes RV unique or different whether it will do well on chart or not or fans will like or not and focuses on their vocals and choreos. Red Velvet being one of the top girl groups is doing well even if they take risk releasing a song not meant for people to like.

What Really Joy Means By 1, 2, 5 is... 1 Group 2 Concept (Red&Velvet) 5 Members Or Albums

Seulgi Blonde, Joy and baby werewolf, Irene and Yeri twins, Wendy double pigtails. Iconic 🔥

Bad Boy - 300M Peek-A-Boo - 200M Russian Roulette - 200M Happiness - 100M Monster - 100M Zimzalabim - 100M RBB - 100M Rookie - 100M

EVERYONE IS SHINING IN HERE OMG, QUEENS OF ALL GENRE

Every SM group got criticized at first then look at how they make music, unlike other kpop groups they don't stick with one concept. As if they giving us every come back an another flavor of their songs. Agree?

i can't understand how this song doesn't get as much hype as Bad Boy, what a masterpiece

I still remember when red velvet comeback with Ice Cream Cake and then i was searching their name on youtube because i want to watch it again (that song is so addictive) but end up with the result which is bunch of "how to cook red velvet cake" videos lol At that time RV was not popular enough and now here they are with a trending video in many countries And when i search red velvet on youtube i found my gurls now Proud of you guys :') your hardwork say it all

SM's music is so unique. First u listen, "Oh, it is so weird, I don't like it". But, few minutes later, " Shit, the song stuck in my mind"

SNSD: you bad bad boy you so bad RV: really really really bad boy Sisters indeed.

A MASTERPIECE

Still can't get over about this era, this era needs a lot of recognition and this is my number one title tracks from rv.

halloween snapped red velvet snapped sm snapped bad boys snapped *wendy’s bangs snapped*

Rv: bad boy Rv: really bad boy Next comeback Rv: super really bad boy

along with birthday rbb had the best outfits for stages they all were different edgy and fun

"I don’t care whether they were number 1 or not. To me only Red Velvet exist. Red Velvet for lunch today." - Reveluv, 2018

rbb is too underrated but this song is a real MASTERPIECE.

the scream is higher than my grades oh wow

This song make me a kpop stan before six years.

Their songs are unique. Not weird y'all.

*-one group* *-two concepts* *-five members* *and million ReVeLuv's*

Why is this song so underrated?! It's one of the best sounding, most complex, most unique, and most difficult-to-perform kpop songs I've ever heard! Someone please let me know why RV is huge, but not at the top :/

absolutely RED VELVET is the group with the best concepts

*First time hearing the song* *; Meh.* *2nd time* *; Starts humming to the song.* *6927th time.* *; OHMYYGODHESAREALLYBADBOYY* *(Dances like noones watching.)*

This is not a song, this is a vocal flexing

RBB after Psycho

sweet lord that D7!! the vocals here are incredible

this song is really giving me hotel transylvania vibes

1 group 2 concepts 5 members 7 _Years_ 11 millions of luvies?

Seriously SM is just flexing all their artist vocals. First EXO Tempo's acapella section and now all these runs and high notes in Really Bad Boy. SM Family is a talented one.

the high note

I bet Suho is learning the choreo with all his might😂

*STAN WENDY AS A PRINCESS* *HER VOCAL IS SO DAMN KILLING ME*

You know it's red velvet when they don't just sing, they have style. They explore music and that's what you call "idols"

Still listening in 2024. One of the best songs with vocal gymnastics the like of which few others can do. That Irene D7 is nuts. The song itself is a marvel. Very complex.

This was the most iconic Red Velvet era and one of the most underrated. :(

*I'll be really honest. I love this comeback.* We all have different taste but for me I'm totally in love with this comeback. First point, the members can all show their full potential, their voices omg I'm just amazed. Second point, the choreo is really catchy, and kind of complex, one of the most complex choreo tbh. Third point, they are the only ones who can slay this song. And I love how SM is not afraid and try new concepts even if it's risky. Fourth point, the best one, Yeri can finally shine among the other, for this comeback, it is really fair, she owns many parts with Irene and looking at main vocals and lead vocal, the line distribution is pretty fair! *Why many people are disappointed with this comeback?* Two reasons : the song is not easy listening and people love more Velvet concept with those vibes that RBB doesn't give but hey guys, you have in front of you Queens Of Concepts!! This comeback is Red and Velvet side/concept at the same time like Russian Roulette. Well if I was asked to give my opinion on this comeback, I'd say this is *a whole masterpiece* .

RBB, we are sorry for the lack of appreciation people gave you because you were ahead of your time.

Red Velvet being unique is everything ❤

They’re really going all out on this comeback, Seulgi blonde, Wendy forehead, Joy with bangs, Irene’s curly hair, and Yeri’s ombré hair 😍!

Seulgi with blonde hair? Iconic. Yeri in the center? We need more of it.

i love how they don't follow trends. they make them.

릴황 께서 라디오에서 RBB라이브를 찢어서 다시 들으러 왔습니당

RBB is still so underrated RV's autumn song.

RV = Real Vocals, Real Visuals, Real Versatility...and Real Violent, as they never stop slaying all day and all night, both figuratively and conceptually.