Say what you want about BSB but you can NOT deny those vocals!

I was waiting for Nick to sing that high note!

After the bridge... they transcends to a whole new height. Just pure talent ❤

This is why BSB have always been my favourite group, because they created a perfect harmony with their voices that no other boyband could. But they're not really a boyband, they're a vocal group. The term Boyband is too simple for them 'cause they went further;)

Good Lord AJ… his voice is GORGEOUS. I’ll love that man forever!

They sound so amazing when they sing acapella. I think this shows just how beautiful AJ's voice is though.

Vocally, they're wonderful! AJ has an incredible voice.

they harmonize so well, it's amazing. And AJ's voice just makes me meltttt.

I love this cover. AJ has a killer voice in this :)

A.J. and Brian have the most beautiful voices.

kevin's bass voice is the bread and butter of this accapella

This is incredible! This shows the raw talent of these guys and why they are so successful even after all these years!

A.J. has the most beautiful voice I've ever heard from a pop star. He throws down in this video. So good.

Even after all these years, hearing AJ sing this gives me chills every time.

All I can say that those guys are amazing, singing acapella just proves how great singers they are. Brian and Alex are just PERFECT!!!!!!

My heart just melted a bit. Brian is amazing.

Brian sound like a baby angel 😇 and aj just so smooth soulful

Personally love BSB acapella over Nsync. It just seems to flow so much more naturally.

This is why BSB are great. They know and understand each other perfectly, therefore the vocal harmony is brutal. Acapella they flow in a sublime way, you can appreciate their vocal nuances and then you understand why they are the best. ❤️ #KTBSPA

Stumbled upon this by mistake but... Wow!!! Perfect sound! BSB FOREVER!!!

Every time I hear this....gives me chills! And every time, I sing along with it! Been a fan since I was a little girl and now I am almost 24 years old. Boys, keep sounding beautiful!

This is ten on ten, Still gives me a chill when i hear their songs after all these years

Nick is so beautiful here!

3:11 the way AJ hits the word 'the' always gives me chills. You ever notice how they always use him for the big finish on a lot of BSB's songs? This song, I Want It That Way, No One Else Comes Close, Larger Than Life, Back To Your Heart, I Promise You, and that's just off the top of my head. I don't know if his finishes just stand out cuz I'm an AJ girl but I love them all. Especially this one :)

AJ's voice... glorious.

I guess they should record an acapella version of the Greastest Hits for the 20th anniversary, now that we are getting Kevin back, we should celebrate it the biggest way possible.

nick always awasome

I've never heard of this video before. OMG! They sound so perfect. These guys have just the most harmonious sweetest voices. Oh man! Wow and AJ's voice!!!! BSB forever!

Aj Has a voice that can make any girl melt! (:

AAAAAAAAAAAAAAAAAAHHHHHHHHH!!!!! I'm going CRAZY listening to this. OH MY EFFING GAWD, they are SOOOOOO AWESOME!!!!!!! I want to do a whole gymnastics routine when I hear AJ sing!!!!

They sure can sing! Love them so much!

whew AJ, AJ, AJ is too good to be true...he seriously is like perfect..God i love him

i feel like screaming after hearing this. this proves how talented they are. they sang that acapella flawlessly......they have the most hypnotic voices. especially aj's. his voice just kills me. no word in the dictionary that could describe how good they are could do them justice cause they're one of the best boybands of all time. and not to mention that all 5 of em are incredibly goodlooking. that just shouldn't be legal.

These boys are perfection!! they are awesome and amazing and they have the best voices out of everyone i have ever heard!! KTBSPA AJ u rock my world

Those voices... 😍❤ I love them so much! 😭😭

AJ is da best out of all of 'em. Keep on rockin AJ you a legend man.

omg just love aj's voice...awesome

Wow, this is great! I agree, they really should make an acapella album. I would LOVE that. Their voices fit so well together, and if people think they can't sing, well explain this! Not many "boy bands" could stay together in harmony when the background music gets taken away. Acapella isn't that easy, anyone who sings knows that, because pitch variation happens. They did an awesome job with this! Love them

I am a dude and I find these men the most incredibly talented group of guys I have EVER or will EVER hear.

+LittleLittrellLover: Its not just AJ... Each one of them is unique and the best thing is, they can perfectly harmonize with each other. Their voices fits each other that's why they lasted this long because they can really really make beautiful/heavenly/very good music. Other artists nowadays would rely on Autotune but them? They don't need one. Just give them a microphone and they will serenade you and bring you to heaven. :))

This is so beautiful it makes my heart hurt. omg.

BACKSTREET BOYS=TRUE TALENT! Seriously..there is no one who can sing better than these gorgeous boys.I love them and so grateful that they are togeather and still making amazing music! KTBSPA! you got billions of fans who loves you guys!! OU GUYS ROCK OUR WORLD!

the music industry really needs more people like them

AJ- amazing.

AJ!!! Oh Aj, he is truly amazing. Luv these guys

I don't care what anyone says, the Backstreet Boys are amazing musicians--their instruments are their voices. This is incredible. :)

Best boy band ever for sure 🥰

this is the group with the best singers of all time! they sound perfect together and solo too..

perfect!!! Wow!!! I love BSB!!! A.J has a lovely voice!!

The beauty of their acapella! One of the few bands that can sing acapella! :))

AJ amazing! sounds beautiful!

Who is here after hearing BREATHE off the DNA album??

wow!! when I was 13/14years old untill 18 or so I was a big fan!! now almost 27!! and when I listen to this there still really the best boyband ever.. amazing!!! and AJ you give me goosebumps all over ha ha..

Gifted. Incredible.

speechless..breathless..and everything else what can i say respect.

i adore aj's voice. this is an aaaamazing version of the song...

See this is the reason why i fell in love with this group. god can take away all interuments tomorrow and it wouldnt matter cuz this group can sing anything. I love them all so much

I feel butterflies!!! AJ I

I Love this!! The Backstreet Boys are simply amazing! I have been a fan since the begining, and always will be! AJ is my favorite he has the best voice, and not to mention, he is hot!

AJ voice ❤❤❤❤

Se é louco, o AJ canta demais, que voz divina ele tem.

These guys are so talented. 20 yeats later, I am still a fan 😍❤️

meu a.j cantando perfeito como sempre adorrrro

No doubt the best boy band ever! And this acapella is just perfect

This is SO beautiful!!! They have wounderful harmony and this song is only one example of how amazingly talented these 5 guys are!

everytime i watch this i fall more and more in love!

they are talented! amazing!

Brians voice is just special totally god sent, thats why he makes gospel cd's probably. To Thank God for giving him one of the best voices, voice like that can put me to sleep from the soul from which he sings from.

Tema da inesquecível e mais assistida novela das 19:00 da noite que se chama UM REFÚGIO PARA O AMOR (2001) do Canal Reviva. Essa novela marcou audiência e é patrimônio cultural e histórico da televisão brasileira. Essa versão a capella ficou uma gracinha e assim foi tema de Lívia (Flávia Alessandra) e Guma (Marcos Palmeira). Que linda essa versão a capella de Shape of my Heart.

oh man so good. I loved Brian and Kevin's hair like that. SO PRETTY!

Forever a fan.. Aj vocals😫

This is so beautiful!!! I absolutly LOVE it!!Aj is amazing in it!

Wow I'm speechless thou I wouldn't expect anything less from BSB

woooo I love this song so much!!! just awesome....AJ....your voice is amazing sooo beautifulllll!!! love it love it love it!!! whoehoeee...

Seriously, no boys band will ever be able to be better then they were and still be now! Those 5guys are the best singer ever!

a pesar del tiempo, a pesar de lo mucho que los hemos escuchado, yo no me canso de oirlos.... son los mejorees!!!

my God this is incredibly, this explains exactly why after 17 years i am still as proud as ever to be a BSB fan! There are no words to describe how talented and awesome these guys are! BSB now and BSB forever! KTBSPA :D

So much soul so much dedication thats why im a bsb fan until im dead.

That was wonderful!!! God, I love this group!!!! Thank You for the BSB!

They are truly talented and have this beautiful gift that have shared with all of us

Amazing. I miss the heyday of pop music and they're definitely one of the reasons why it was so good!

my favourite performance...too emotional

One of my fave Bsb acapella performances! Flawless.

no me muero me derrito me desago me todo!! a capella son imprecionantes hasta mejor q en vivo los amo definitivamente! son lo maximo the best the best!!! ^-^

Has anyone ever heard a better acapalla. BEUTIFUL

Passe o tempo que passar, sempre amarei e serei fã desses garotos maravilhosos. Agradeço por terem feito parte de minha adolescência e de estarem presentes ainda em minha vida. bjusss

i'm with you on your AJ comment to me is one of my fav male voices. amazing runs !

They do the best a capella songs I've ever heard in the music history. That's called talent, and they were born with it.

im speechless. this couldnt be more perfect. i love the special things they did to change it up...so it wasnt the CD over again. they're perfectly in tune. and amazing and ajs high chest note was unbelievable! these boys will always be the best! KTBSPA!

Meu deus eu não canso de amar meus BSB 🥰

wow..absolutely marvellous

Now that is breathtaking.

AJ the best!!!!!!!!!!!

I agree Bsb are absolutely amazing voices, harmony, everthing is amazing, I love them so much and so deep S2.

Good Lord... this just made me fall in love with them all over again. They're so amazing... I can't wait for their next tour!

Amazing, i get chills and goosebumps when they sing acapella. For all those critics out there that think they are a manufactured boy band that can't sing, here is your proof...breath taking i love it

When Brian sings my heart melts... lol

How anyone can dislike it? If you close your eyes and just listen... you fall in love. That's BsB Power. I'd love A.J McLean since I can remember....

i can listen to this for hours and hours. its beautiful!

When i listen/watch this, i know why i love them. one word: WONDERFUL