I love that Ailee's a solo artist, but there's something special about her duets. The way that she balances her voice with other people is so smooth and effortless. In her duets, she nor the other singer overshadow the other. They actually sing together and it never sounds like a contest, just two voices complimenting each other.

Almost a year later and im still shook. Kim Bum Soo is like the only male artist that can keep up with Ailee, istg his vocals are no joke and his harmonies are so well aligned with Ailee that she didn't need to hold back like she usually tends to do during duets. If you listen to the song and focus your attention you him you'll hear just how amazing the harmony is especially during the high part. Omg i can write an essay with how well this duet is with these two as the perfect vocal pair.

Still listening 2021🤟👋 who's with me? ㅋㅋ

Their voices suit eachother. They're both have thick, full voices and it blends. They're so in sync. The emotions too

I acctually loved the look on wheesung's face he's like a proud dad of Ailee and he wasn't even a bit surprised he've expected this level of talent and great singing since day 1 since her debut and pre-debut he believed in this singer and introduced her to the world producer her debut song heaven and BAAAM a powerful charismatic singer with a legendary voice was born ♥♥♥♥♡♡♡♡

I killed the replay button. Kim Bum Soo's vocals were really put to work here and compliments Ailee's voice very well. I mean, those harmonies are no joke. The high nites were out of this world and on point. 👏👏👏👏👏

How can all of you not talk of Kim Bum Soo? People please, he is such a great singer!

3:36 BeWhy: "what is this, what is happening, how is it that I'm feeling all these weird emotions?! IM CONFUSED." 😂😂😂

The harmony between kim bum soo and ailee is so mesmerising to see and soothing to listen to,honestly feel this song needs more recognition!

My dream has finally come true. Kim Bum Soo and Ailee. Am I dreaming?

3:34 he looks so confused XDXD he's trying to figure out what kind of witchcraft is this. What an amazing performance and such powerful vocals my god.

대한민국은 에일리 보유국입니다!

If the Female is not Ailee it would not as beautiful like this

THIS IS SO BEAUTIFUL I WANNA CRY

Who's still watching it right now. March 2019?

best duet ever... who still looking for and watching this great and extraordinary duet in 2021?

When two great vocalists collab. Wigs will FALL AWAY..

The talent in Ailee is actually RIDICULOUS!!

2019? they slaying this song Kim Bum Soo is one of best male singer in Korea And Ailee, Queen is always perfect love you both.. kisses from Indonesia

These two are amazing and shame on the world for sleeping on them.

Is it just me or it feels like our Queen looks much younger from her recent performances up to now. The way she dress kinda feels different from her past outfits. Anyways, feel kinda proud to our Queen for other singers and audiences to hear her singing live.

That high note thou💕❤😘SlayAilee❤

Still listening 2023👌🏽

The best duet I've ever seen in my life

Those high notes really woke me up.Their voices amazing 😵❤

The Queen and The King

I always come back to this when I want to hear greatness.

2023 and still here ✌️✌️✌️✌️

1st collab is "Fly Away" 2nd collab is "Fall Away" I wonder what is the next title of the song... Hahaha "Far Away?" lol

Cannot describe in word. I think this music genre suit her the most. She doesnt have to find another genre

In the follow up interview on the actual episode, when BeWhy said “this song is made for Ailee and Kim Bum-Soo and that nobody else could sing this song like them, ever.” And Kim Bum-soo said “Ailee’s the perfect partner for this duet and their energy together is a first for him.” I love ailee so much ❤️ Queen

can’t get over how Well their voices blend together... the live is seriously better than the recorded single, this is a testament to their prowess as singers. the performance broke my heart like this video broke my phone damn it

I can’t stop hitting replay! This is an earth shaking performance. I’ve never heard such a beautifully sung and incredibly balanced duet! Wow. Just wow.

Omg that ending!! Im in tears her expression in the last part 😢💟

김범수 목소리는 정말 멋진것 같다

The only one who can keep up with aillee

They matched so well!!!!

I always like seeing the audiences reactions it makes me feel so proud for some reason ahahaha

I remember on I can see your voice Ailee said if her and Kim Bum Soo got married and had a kid their kids vocals would be wow and I couldn't agree more.

2022? i just want to say its really great, i love it a lot. I dont know why but it makes me really emotional thank you for this masterpiece.

Bum Soo and Ailee have been in the same events as guest performers for many times last year but they did not have a chance to sing a duet together at these events. Their last collaboration in 2015 was so short so I am really thankful that they sing a full duet this time. It takes weeks, months or even years to rehearse together to develop the skills to listen to each other and breathe together in order to sing a perfect duet. They harmonized so well in terms of volume control, vibrato, expressions and even the detailed ornamental notes. They have demonstrated their awesome musicianship because they were given only 2 weeks of preparation time despite their busy schedules. Thank you both for giving us a perfect and beautiful stage. Thank you Bum Soo and Postino for writing this beautiful song. In the past, Bum Soo has invited many talented artists to perform at his concerts so it will be wonderful if Bum Soo brings this beautiful stage to his year end "Luxury Back" concerts in Korea this year and to his 20th anniversary tours! ❤

THEY HAD ME AT THE START

서로 반대를 바라 보고 있는 두 사람의 얼굴로 구성한 영상 연출이 애절함을 더해 주는 듯

The most powerful collab EVER.

Ailee+kim bumsoo= daebak❤

이조합을 누가 깨냐?? 다덤벼라,,, 진짜 최강의 코리아넘버원 듀엣이다,,, 노래로 1등먹는 남자보컬 여자보컬의 만남이구먼,,,, 캬하,,,끈내주게 좋다,,,

I think beWhy is feeling ailee's and kim bun soo's emotion and it's the first time he ever felt that way and he is so confused of what happen. hahahahaha too cute

Their voices compliment eachother so well lawdd 😩😩I’ve replayed this so many times already

Not to take anything away from ailee (shes freakin ailee, nuff said) but man..am i the only one shocked at this bumsoo? I mean dammn he can sing sing!!

Kim bum soo giving ailee a proud look and calling her for a hug IS EVERYTHING 😩

2:19 에일리 마무리 좋고 김범수 화음 멜로디라인 끝처리 조온나 감미롭다.. 이부분 들으려고 영상으로 봄

Kim Woo is such a classy act. His range is absoulutely limitless. Ailee is touching everyone's hearts. Especially all of Korea and its music industry. She brings so much volume to every person that she sings with, acsentuating all their musical talents, range of voice, and all kinds of genre music. I just love it!!

이거 진짜 너무 좋아 어떡하지? 이렇게까지 앞은 사랑은 못해봤지만 노래 들으면서 그 아픔을 느낄수있게 해준것같아서 ㅠㅠㅠㅠ 진짜 대박인듯. LEGEND. AILEE X Kim Bum Soo

My favourite break up song of all time

This song is so under rated i can't 😭😭😭😭 its such a beautiful performance 🖤❤

I've watched this video (and all of Ailee's duets on the call) at least 20 times in the past three days- and I still can't get enough 😍😍😍

She like can be everyone who we think a great singer- She can be korean beyonce through her vocal n perfomance attitude, or mariah carey n whitney if you want that crazy highnote

Whose still watching in 2021 ❤️

김범수 소리 진짜 단단하고 쨍하다

Since the first season is over, I still think that this is my favorite Ailee collab

Two of the best singers in the World today.

I forgot to breathe throughout the performance. Goddang~!

Ive loved ailee's voice always but HIS VOICE IS SO BEAUTIFUL WTFFF

무대 스크린이 서로의 얼굴을 비춰주니.. 바라 보며 노래 부르는 순간, 노래 가사처럼 서로 반대를 바라보게 되는 연출도 기가 막히네요 길이길이 생각나는 무대입니다 ㅠ 이 방송으로만 끝내기에 너무 아쉬운 무대네요.. 같이 활동해 주세요 ㅠ

this song has been ailees best duo so far. His voice just goes so well with hers, and the harmonization overall is just heaven

The 2 most talented singers!! Having a duet damn this is the Best Thing Ever!! Like legit their voice is real and incredibly so soothing, and filled with emotions!!

국내 탑보컬들의 콜라보라니ㄷㄷ

A duet you'll remember for the rest of your life. You can feel the emotions in their voices and performance. I get goosebumps whenever I listen to it. They complement each other soo well. One of my forever favorites.

Everytime i listen this song gives me goosebumps.This duet need to be more appreciated

This song has been on repeat since I discovered it!❤

His voice is so clear & fits perfectly with Ailee’s uGh so beautiful 😍

Kim Bum Soo's and Ailee's voices were so beautiful I cry

Exactly what I thought it would be like. They’re amazing together!

Finally Ailee featuring Kim Bum Soo. I wish Ailee have a chance to featuring Park Hyo Shin.

여기까지 날 이끌어준 유튜브 알고리즘에 깊은 감사를 표한다...... 예상치 못한 큰 선물을 받은 기분이다.

Nearly 3 years later and I still come back to watch this performance. Will never get enough of this. So beautiful

The guy at 3:35 is all of our reactions 😂❤️🌹

Two of the best singers in the world, not just Korea.

You know it’s a good duet when both the singers hug each other, which is not common from what I’ve seen so far❤️ I love these two!

역사에 남을 남여 듀엣 곡이 될 듯

Ohmygawwwh!! Ailee and Kim Bum Soo vocals are so beautiful!! 🙊🙊

Ailee's voice never disappoints anyone

I know Ailee's voice are incredible..but,Bum Soo's voice also superb. Their colab are insane and a total harmony. I just live it so much.

3 months of re-watching and i can't overcome it yet.. They are not joking here..

I seriously got goosebumps all over my body😳😳😳😳😳

This deserves all the hype Ailee and Kim Bum Soo singing together is everything good in this world

I’ve been listening to K-pop over 20 years and this compilation by Kim Bum Soo and Ailee has been the best of anything I have ever listened too....

I liked this video even before I listened to the song. In an event such as this, where two legendary vocal powerhouses collaborate to make such a masterpiece, I just knew I was in for one hell of a performance.

Oh my God ailee's voice chills me 👏🔥

this has definitly made my day ♥♥♥♡♡♡ it's been a while since I've last heard a duo in this beauty and if it wasn't both of them the king and the queen it wouldn't be so powerful and lengendary like this ♥♥♡♡ wow I'm impressed their voices is so unreal I have no other words to describe this performance as expected from world class vocalists for me they're the best combination of artists the best vocalists in the world Ailee Kim Bum So fighting ♥♥♡♡

Both voices just strike you deep ❤️ Kim Bum Soo is exceptional and together they are top notch 🙌🏼

Best duet ever.. crying into ice-cold winter tea... goodbye...flying away...

I start to like this show, it getting interesting from time to time. It gonna be my favourite show..❤❤

Beautiful voices!!😍

2022 and still watching...❤️

So painful ... Still listening in 2021

Kim Bum Soo & AILEE = epic duet and fav vocalists ❤️

김범수가 얼굴빨로 올라온게 아니라 실력파라는걸 입증하는 영상

When you are in a broken heart and listen to this song you will find you are crying.

this should be standard.