The 66-year-old musician was half-way through singing 'Waitin' On A Sunny Day' when he spotted Hope fist pumping to the song.
Donning a lime green jacket and pink hat, it was hard for the singer to miss her enthusiastic dancing in the front row.
After a few minutes of watching Hope, Springsteen reached out his hand and invited the four-year-old on stage. An offer that she slowly accepted.
Open Image Modal
Facebook
The pair held hands and danced around to the song.
And then the magic happened.
Springsteen sung the first line of the chorus then pointed the microphone at Hope and she perfectly sung: "Waitin' on a sunny day, gunna chase the clouds away."
The crowd let out a huge cheer and Springsteen looked pretty gobsmacked that Hope knew the words.
Open Image Modal
Facebook
After a short duet, Hope intended to head off stage back to her parents, but Springsteen picked her up, placed her on his shoulders and danced to the rest of the song.
The Facebook video was uploaded by Thomas Andersson on 29 June and was viewed nearly six million times in six days.
It was also shared 87,000 times.
Open Image Modal
Facebook
"That is a memory that will last for the rest of that little girl's life," one fan wrote.
FYI: your kids WILL want to climb on the letters and take pictures with it every time you walk by, but on the plus side it will become your foolproof meeting point throughout the weekend. (credit:Joseph Okpako via Getty Images)
Kids Running Around Everywhere(02 of11)
Open Image Modal
No matter what garden you choose - the Upper Kids' Garden for the little ones or the Lower Kids' Garden for older kids - there will be children. Everywhere. Running around. Don't say we didn't warn you. (credit:Caitlin Mogridge via Getty Images)
Festival Fireworks(03 of11)
Open Image Modal
The fascination of fireworks never grows old with kids, so the display on the last day of the festival will leave them feeling over the moon. (credit:Joseph Okpako via Getty Images)
Fairground Rides Galore(04 of11)
Open Image Modal
Thank goodness for ways to keep your kids occupied. The Lower Kids' Garden will have rides that your kids literally won't be able to get off. Expect queues (soz). (credit:Barcroft Media via Getty Images)
Those Kids Presenters You Only Usually See On TV(05 of11)
Open Image Modal
You know those faces you know so well from the TV? You'll end up seeing them in the flesh. Just like Justin Fletcher aka Mr Tumble here. (credit:Joseph Okpako via Getty Images)
The Infamous Literary Institute Tent(06 of11)
Open Image Modal
Authors, poets and other inspirational speakers come together in a relaxing tent. Oh, and it gives parents time-out from entertaining. (credit:Caitlin Mogridge via Getty Images)
Kids On Shoulders Constantly(07 of11)
Open Image Modal
When there are acts, singers, entertainers or comedians on the stage and your kids want to see them, they will request to be put on your shoulders. Deal with it. (credit:Rob Ball via Getty Images)
Arts And Crafts Tents(08 of11)
Open Image Modal
Be prepared to get messy (or let the helpers give you a hand) with glue, paints, paper, stickers and everything else you can think of in the crafty tents. (credit:Caitlin Mogridge via Getty Images)
All The Fancy Dress(09 of11)
Open Image Modal
Don't expect to head to the festival with your usual clothes and not feel left out. Camp Bestival is allll about fancy dress (and this year's theme is 'Outer Space'). (credit:Barcroft Media via Getty Images)
Chillout Zones (Phew)(10 of11)
Open Image Modal
The team behind Camp Bestival knows only too well that sometimes, parents just need a bit of "me" time. Thankfully they've created their own 'Slow Motion' zone to give mums and dads the chance to slow down, recharge and recoup. (credit:Caitlin Mogridge via Getty Images)
New Mums Area (Hooray!)(11 of11)
Open Image Modal
New mums, rejoice. There's a designated space for you and your babies to chill out, feed, change nappies and do whatever you please. Look for the 'Breastival Mother and Baby Area'. (credit:Vladimir Godnik via Getty Images)