All eyes were supposed to be on the incredible acts, but viewers couldn't help but notice the reactions of the Royal Family at King Charles' Coronation concert.
Take That, Katy Perry and Lionel Richie were among the star-studded names performing to the lucky crowd of 20,000 people in the grounds of Windsor Castle.
The royals did not disappoint, with Princess Charlotte's hilarious faces being a huge highlight, as well as Mike Tindall's singing.
There was a lot of fun to be had, but it was also a very emotional occasion and Queen Camilla was left close to tears during one memorable act.
Here is a look at some of the best royal reactions from the night.
Charlotte's funny faces
Princess Charlotte was the stand-out hero of the night.
The eight-year-old kicked things off by pulling a hilarious baffled expression while listening to DJ Pete Tong playing 2016 banger Feel The Love.
Before the concert, Tong revealed the the King specifically requested Ibiza classics songs for his concert.
Many viewers at home were a bit confused and felt the same way as Charlotte, who looked a tad surprised by the opening song.
The music later on was far more to Charlotte's tastes, as the princess was seen singing along to Katy Perry's hit track Roar.
She's clearly a big fan, as Charlotte was seen mouthing all the words while waving a small flag around.
Zara and Mike
Zara and Mike Tindall are some of the most popular royals - and they thrilled audiences on Sunday night
During the concert, the England rugby legend was singing and dancing along to the music along with his royal wife.
Concert viewers flocked to Twitter to praise Mike and Zara for fully getting into the right mood.
"Please can I have some of whatever Mike Tindall had," tweeted one viewer.
"Love Mike Tindall singing along! Go Mike," added another.
A third wrote: "Mike and Zara having a seat boogie is hilarious."
Mike asleep
However, it looked like it was all getting a bit too much for tired Mike.
The popular royal couple have had a few late night parties in recent days, having returned home at 2am after having dinner with other members of the Royal Family on the night before the ceremony.
It didn't impact them during the Coronation, but it seems the weekend's busy schedule was making Mike sleepy.
The cameras caught him wiping his eyes during one song - and it was fairly early on.
One viewer tweeted: "Mike Tindall does look tired doesn't he! TBF… it has been a busy weekend"
Sophie dancing
Sophie, the new Duchess of Edinburgh, was spotted by cameras having a solo boogie to 'All Night Long' by Lionel Richie.
She was praised for "letting her hair down" and has been dubbed the most "normal" of the royals.
Sophie was spotted in the crowd dancing in her stylish yet demure coral dress.
Many people were left shocked at how good her dance moves were and how down to earth she must be to feel comfortable enough to let her hair down at such an event.
One wrote: "Good for Sophie Wessex actually looking like she's having a good time, like normal people look at a concert."
Another mused: "Loving Sophie Wessex. She is a middle-class girl who married into the maddest family in the world but kept her feet on the ground. And she was the late Queen's favourite because of it."
Kermit and Edward
Not one to be left out of the fun, Sophie's husband Prince Edward also had his moment in the spotlight.
The iconic characters from The Muppet Show joined the host of the Coronation concert, Hugh Bonneville, on stage with Miss Piggy being unable to hide her attraction for the Notting Hill actor.
Later on in the show, viewers were left in stitches when Kermit the Frog was spotted sat on Edward's knee.
Some people joked that Prince Edward and Kermit had attended the event 'twinning' in almost identical formal outfits for the occasion.
People were posting a flurry of crying with laughter emojis at the similarities between the pair, with one joking: "I love how Edward and Kermit are kind of wearing the same outfit."
Charlotte's gesture to George
During the concert at Windsor Castle, Prince William took to the stage to give a speech dedicated to the King and the key workers in Britain.
When the Prince of Wales appeared on stage, Charlotte perked up immediately, looking excited and gesturing to her brother to look at their dad, pointing over in his direction.
George, amusingly, didn't look quite as impressed to see his dad up there.
The cute sibling moment was also spotted by numerous fans on social media, who branded it 'heartwarming'.
One person tweeted: "Whatever your thoughts on the Royal Family, you can't fail to find Princess Charlotte joyfully pointing out her father to her brother when he appeared on stage incredibly heartwarming. A reminder that the key word in Royal Family is Family."
Kate sees William
Elsewhere during the speech, people couldn't help noticing how 'proud' Kate looked of her husband - and they loved her reaction to his cheeky joke.
At the start of his speech, William told the crowd: "Good evening Your Majesties. Good evening Windsor!
"A huge thank you to everyone for making this such a special evening.
"I want to say a few words about my father, and why I believe this weekend is so important. But don’t worry, unlike Lionel, I won’t go on all night long."
At this joke, Kate could be seen tilting her head to one side and smiling wide, before letting out a little chuckle.
Fans on Twitter rushed to share their thoughts on the sweet moment, with one person saying: "She's sooo proud of him. Her smile is everything."
"She looks so in love," wrote a second.
William teases George
In one amusing moment Prince William decided to tickle Prince George's nose with his Union Jack flag and Princess Charlotte.
As the Coronation Concert closed last night on Take That's final song, Never Forget, William and Kate were seen waving their flags, smiling and clapping with their kids.
Then in a split second, eagle-eyed viewers saw William larking about with his nine-year-old son and jokingly whacking him in the face with his flag.
George took the joke and shut his eyes while William grinned at himself, and then made a beeline for his daughter too.
But the Princess saw it coming and swerved her dad's flag, leaning towards her mum to get away.
The antics were shared on social media, with one TikToker coining it their 'favourite bit' of the Coronation Concert and another saying: "But did anyone else spot this?"
Kate enjoying the muppets
One of the strangest and most hilarious parts of the night was the arrival of the Muppets.
Miss Piggy and Kermit the Frog stole the show when they interrupted Notting Hill actor Hugh Bonneville halfway through his presenting for a fun skit.
While the King and Queen may have looked slightly baffled at first, William and Kate could be seen cracking up at the jokes and making comments to their kids.
Princess Charlotte couldn't hide her smile as Miss Piggy made her advances on Hugh, while George covered his face as he laughed at the bizarre encounter.
An expert lip reader has revealed what the Prince and Princess of Wales thought of the segment, when Miss Piggy asked Hugh if he was single.
Jacqui Press told the Daily Mail that Kate particularly loved the sketch, exclaiming: "That's funny!" as she sat next to her daughter Charlotte.
William was especially amused by Hugh's quip, when he called the Muppets character a 'pig in a dress' - and the Prince repeated it under his breath with a laugh.
Camilla close to tears
There may have been such huge names in the performing line-up, but it was a 13-year-old girl who captured our hearts.
Blind pianist Lucy Illingworth won Channel 4's show, The Piano in March and was given a coveted spot to perform on stage at the Coronation Concert.
Lucy performed a rendition of Bach's Prelude in C Major for the Royal Family and her impressive talent clearly made many people emotional including Camilla, who appeared close to tears while watching.
The King and Queen watched closely and gave the 13-year-old a round of applause when she finished her note-perfect performance.
And they aren't the only ones who were moved by Lucy's skills.
Those watching the concert at home flocked to Twitter to share their thoughts, agreeing she was a 'star' and had 'stolen the show'.
Kate helping Charlotte
Before the concert began, Kate was seen helping her daughter with her bracelet.
Charlotte seemed to get stuck with her electronic device, which was used later in the show to light up the grounds of Windsor Castle.
The youngster appeared to chat to older brother George about the bracelet as they got ready for the music to begin.
She turned to mum Kate, who helped her eight-year-old daughter to sort out the bangle so she could enjoy the music.
