Princess Charlotte sings along with Katy Perry at coronation concert

You’re gonna hear her “roar.”

Princess Charlotte, 8, was spotted singing along to Katy Perry’s performance Sunday during the coronation concert held for King Charles III and Queen Camilla.

Perry, 38, took the stage in front of 20,000 people, rocking a metallic gold Vivienne Westwood dress and belting out rousing renditions of her hit songs “Roar” and “Firework.”

During the “I Kissed a Girl” singer’s first number, the camera cut to the royal box and showed the princess of Wales and her mother, Kate Middleton, 41, enthusiastically waving the Union Jack flag while mouthing Perry’s catchy lyrics.

Prior to her performance, the “Teenage Dream” singer was spotted looking confused inside Westminster Abbey and then tripping and nearly falling to the ground following the ceremony.

Twitter users went wild over the brief glimpse of the little princess.

“She’s so cute,” tweeted one person.

“Why do I feel like Princess Charlotte requested Katy Perry to perform at the #CoronationConcert,” wrote a second fan.

“I love Princess Charolette,” gushed a third.

The singalong was just one of several notable moments the young royal had over the coronation weekend.

Charlotte and her younger brother, Prince Louis — who already was known to act up during important royal functions — stole a bit of the spotlight from their grandfather, King Charles, 74, when they participated in the ceremony on Saturday, May 6.

Louis, 5, was spotted waving at onlookers and yawning during the liturgy at Westminster Abbey.

Charlotte, while having no official role in the coronation, managed to secure a front-row seat with her family to watch her grandfather ascend to the British throne.

Meanwhile, the duo’s oldest sibling, Prince George, 9, was given the special task of being one of Charles’ pages of honor and held the monarch’s red cloak as he walked into the church.

On Monday, both Charlotte and Louis appeared alongside Prince William, 40, and Middleton and took part in a variety of activities at the 3rd Upton Scout Group.

The royal clan stopped by to participate in an initiative titled “The Big Help Out” — a day full of charity and volunteering.

Charlotte and Louis were snapped taking archery lessons and were also seen excavating, sanding and painting.