Wow, just wow! What an amazingly talented little guy but how could he not be given who his parents are! 😘

This child is a prodigy! Great job Rennie! Mom and Dad I’m sure are so proud of you!

Are you seriously kidding me?! Wow! Rennie’s got serious talent! He’s 3!! That was awesome! 👏

One of my favorite things to come out of 2024! Rennie absolutely rockssss

That's crazy. He's so good. So cute. Inherited talent

Amazing, amazing, amazing. Mom and dad are so talented and look so proud of this talented child❤

❤This is so fun! As long as this little guy wants to perform.

Wow your little boy is fantastic what a talent

Absolutely incredible. He has blown me away❤️

WOW! What a wonderful performance. He’s so cute. He was reading the audience LOL. He will go places with his talent! Great job Remmie!!

Amazing! Rhythm in his veins…

Rennie is a natural talent and Daniel was amazing and quite gracious to share the stage. I can't wait to watch Rennie become super famous like his parents!!!!!!

What an amazing child. I've been watching this video over and over again. Kudos to his parents. Watching from Norway 🇳🇴🇳🇴🇳🇴

WOW just WOW!!! 👏👏👏👏 Beautiful God given talent❤

RENNIE STOLE THE SHOW FROM EVERYONE🎉❤Proud parents, the Fosters😊

Your Husband is one of the most AMAZZZZZIG writers n composers of music for soooo many decades..now ur son is following in his love of music. You r a joyous Mama n wife. Beautiful to see him

Wow 🤩 Rennie you are a rising star,so cute and talented. The rhythm of your mom and dad is running through your blood♥️😍♥️

Amazing Rennie !!🙋 Wow Wow Wow..❤🥁❤🎵🎶

MIND BLOWN! We need to see Rennie, at minimum, once a year to track his growth. I shared this to my Facebook page and tagged my 2nd grade and beyond best friend who is a drummer since Junior High He's always posting drummer clips, He's gonna lose it over this 😃🥁

Dumbfounded! So excited for both you and Katherine and of course, Rennie! How much fun is that!❤ that’s just the greatest!

GOD BLESS THIS LITTLE PRODIGY ❤❤❤😊

What a real child prodigy! Wow!!!

Way to go, Rennie! You did a great job! Kudos to the proud parents for nurturing his talent, and he has a lot of it.

This child comes from great musically gifted parents! What could go wrong? nothing!!! Greetings fron Vancouver Island!

Wow beautiful child. No wonder he’s David foster and kat McPhee son. Two talented people.

Wow goosebumps! Unbelievable God bless

Wow!? Gifted child prodigy! It's in his genes! Amazing talent!

This was PHENOMENAL!!!👏🏼👏🏼❤❤🔥🔥🔥no words!!!

I love this so much! Wishing that child ever good thing.

Oh wow.....he is Absolutely a Star already and Rennie ypu have given me Goosebumps! UR WONDERFUL MOM and DAD are soooo Proud beyond words ...And I am as well.Hugs to you my Precious boy from Nova Scotia Canada❤❤❤

Kennedy Center is so fitting for your debut; Grandpa McPhee would be so amazing proud of you💖🥰

That is the most adorable, sweetest just beautiful, RENNIE 👏🏾👏🏾👏🏾👏🏾👏🏾👏🏾👏🏾👏🏾 you had me with tears 😭 of joy 🥹

absolutely Brilliant Well Done ! Catherine and David🎉

I’m always reminded of Michael Johns when I hear this. Way to GO, Rennie!! 🎶 ❤️❤️❤️

Oh my gosh he's amazing!!!!

Wow! I cried through the whole thing. So wonderous! Rennie is so gifted! Ms. M. Moore USA 🇺🇸

So sweet father and son, how proud is that on the same stage what a talented boy not surprised, because look at the mother look at the father but he’s got some set of jeans this kid. Adorable God bless.❤

Wow, Wow and Wow! Amazing! ❤

If you are feeling down and out just take a look at this wonderful video !! You will soon feel better.

That is amazing just look at him go!

This is awesome!!

I was missing you 🥺 this is so cute 🥰

WOW!!! Amazing!👏🏼👏🏼👏🏼❤️

He's amazing 🥰

Wow , they must be beaming with pride

Weird with a kid no tlc like a prop ! Very talented child !! Give him hugs!!!

Wow, incredible. ❤️

Wow so good for his age.❤️

Wow amazing rennie

So cute thanks for this Sara ❤

Im happy that you’re back❤

Adorable ❤❤❤

So Amazing Luvvv it and HE will be Absolutely Amazing and Well Known! Welcome to the BIG STAGE! Lol

So sweet❤❤❤❤❤❤

That was really fun.

Brilliant! 🙏🏻

Amazing!!!

Awesome great job.

Amazing 😍

So cute and talented!

Where is Rennie’s ear protection ? Hearing loss is cumulative ! He’s so talented and precious 🥰

Wow wow wow ❤

I love this ❤❤❤❤ We missed him in Chattanooga so we’ll have to come to another show!

Wooooow..... 🎉🎉🎉

Good Job lil guy ❤

👏🏼👏🏼👏🏼

Hey Kat, Rennie is adorable But if you post a video of him it's ok to show his eyes The heart looks ugh Love you guys!

What a thrill

Cute and talented boy!

👏🏻👏🏻👏🏻❤

That child is going to go far!! I feel sorry for the singer....nobody cares:) Eyes are on the kid!!

David looks happy.

🎵🥁 Its in his DNA!! Wow just Wow!! TRAVIS BAKER look out😂

Why is his face covered in photos but he's onstage?

😇🙏❤️🥰

❤❤❤👍Like ❤️

How old is he?

I almost feel bad for everyone who has to share a stage with Rennie because it is impossible to pay attention to anyone else. Key word being 'almost'😂

I can’t believe he is not a baby anymore.

That's a big star in a very little body

Just thinking how all this came together from AGT and one marriage for Katharine and then divorce and then years later hooked up and married David Foster. And then they had a wonderful baby boy and here he is. It was meant to be and here is the proof. I think David finally found the love of his life.

Child prodege for sure, when I was three I was eating mud

Oh great nepotism starting in the womb

That's crazy he must of heard a lot of music while Mom was PG and has the gene to copy music.

Kinda rude inviting a singer when all the attention is on this prodigy. I never noticed the singer