Olivia Rodrigo, Iris Apatow, Charli D'Amelio and Avani Gregg Get Matching Friendship Tattoos

Olivia Rodrigo, Iris Apatow, Charli D'Amelio, and Avani Gregg have solidified their friendship in a big way!

On Wednesday, D'Amelio shared a TikTok video showing that the four BFFs took a trip to the tattoo parlor for some matching ink.

In the clip, paired to Pharrell Williams's "Just a Cloud Away," Rodrigo and Apatow, both 19, got matching heart tats on their index fingers while D'Amelio, 17, and Gregg, 19, got the same smiley face inked into to their fingers.

D'Amelio smiled and then covering her mouth as she got her new tattoo, according to the video. All four then posed for a picture with their completed tats.

Another video from their girls night out showed the pals posing and lip-synching together to Tyler, the Creator's "Best Interest."

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Their friendship tattoos come after Rodrigo's big night at the iHeartRadio Music Awards on Tuesday where she was nominated for nine awards and won three, including female artist of the year.

The Grammy nominated singer is also awaiting the release of her Disney+ film titled Olivia Rodrigo: driving home 2 u. Earlier this week, Rodrigo spoke to PEOPLE about how her life has changed since it took a turn following the release of her debut single "drivers license" and debut album SOUR.

"The process of making SOUR, and putting it out in the world really challenged me, and I've grown so much, and I've learned so much more about myself," she told PEOPLE. "I definitely feel like I am a more confident person today because of it."

Rodrigo continued, "The entire process of filming the film, for me, was just super nostalgic. It was all kind of about revisiting this past era of my life, and closing that chapter. So, there was a lot of nostalgia involved."

As Rodrigo closes this chapter of her life, she's opening a new one, beginning with her SOUR tour in support of the album.

The tour will kick off on April 5, and Rodrigo told PEOPLE she's "stoked" to experience her music with her fans.

"I've been in rehearsals like every day. It's so much fun. I am just so excited to get on the road. It's been kind of a weird experience, putting out my music in peak COVID where everyone's so isolated from each other," the "happier" singer said. "The music blew up, and I never got to actually experience that with real people. So, I'm so excited to see in real life, all the people that the music has affected and just sing and dance, and have so much fun with all these new friends. I'm really stoked."