BLACKPINK seen backstage as Ariana Grande performs at Coachella Stage during the 2019 Coachella Valley Music And Arts Festival on April 21, 2019 in Indio, Calif.

Fans across the world let out a collective "aww" when BLACKPINK member Rosé thanked Ariana Grande for sending her a bottle of the singer's Cloud perfume, with Ari writing "love you" back to the K-pop star.

The adorable moment marked the latest in the budding friendship between Grande and the ladies of BLACKPINK. See our brief history of the gal pals below.

February 2017: Jisoo performs a dance cover of "Side to Side"

For a year, BLACKPINK member Jisoo was an MC for Korean music program Inkigayo and for a special performance that introduced her as the new host -- along with GOT7's Jinyoung and NCT's Doyoung -- the singer performed a special dance cover of Ari's hit "Side to Side."

July 2017: The girls sing "Into You" on a live stream

While Blinks were still getting to know the BLACKPINK girls, fans did quickly learn of the group's love for Ariana Grande. During a live-stream broadcast, viewers were treated to some impromptu singing by the members, delivering a bit of Ariana Grande's "Into You." It was a particularly special moment for fans to hear member Lisa show off her strong singing, effortlessly floating through the song's pre-chorus. There's been a few other TV and social-media moments where the girls have covered the song.

August 2017: Jennie goes to Ariana's Seoul concert

Jennie was in full fangirl mode at the Seoul concert date of Ariana's Dangerous Woman Tour, even buying merchandise and a lightstick for the show.

Jennie Kim-- of BlackPink-- is a fan of Ariana Grande---- she went to Ari's concert last Aug 15 on Seoul,South Korea---- pic.twitter.com/8uSPUpU94g — pinyuh (@andengrande) August 29, 2017

July 2018: Ariana likes BLACKPINK fan art

One of the earliest indications of a potential friendship between both artists came when fans saw that Ariana gave a "like" to a fan-art post on Instagram starring BLACKPINK member Jennie.

August 2018: Rosé shows support for Sweetener

Rosé made it clear that she was loving Ari's Sweetener album upon release, sharing moments on her Instagram Story of her listening to deep cuts like "Goodnight n Go" and lyrics from the LP's Imogen Heap interpolation.

Update: Rose is listening to Ariana’s album too!!! Legends supporting legends!!! Imagine if there really was a Blackpink x Ariana Grande Tour, OMG---------- pic.twitter.com/LjTNd9fAaw — Hope ¹²? (@hjay14) August 18, 2018

August 2018: Jennie also shows Sweetener support

The same month Ariana released Sweetener, Jennie also captioned an Instagram photo with lyrics from one of the LP's tracks "The Light Is Coming."

March 2019: Rosé uploads a funny cover of "7 Rings"

Just days before they'd meet at Coachella, Rosé uploaded a silly cover of Ariana's Billboard Hot 100 No. 1 hit "7 Rings" but served more Sound of Music than Dangerous Woman. Fans loved hearing the New Zealand singer deliver a British take on the song through lines like "Been through some bad shit, I should be a sad bitch."

March 2019 - Ari says her Coachella plans include BLACKPINK

Days before both artists would make their Coachella debuts, Ariana shared with a fan on Instagram that she not only knew BLACKPINK, but was also going to try to see them the second week of Coachella.

April 2019: They finally meet at Coachella

The photo fans around the world were waiting for: Ariana Grande and BLACKPINK together in the flesh! Sadly, member Jisoo was missing from the photo (the girls later said she was resting at the time), but the photo went insanely viral with Grande yet to post a photo afterward that has more likes than the 6.7 million the snap has accrued.

April 2019: BLACKPINK gets into Ari's NASA gear

BLACKPINK's Jennie, Rosé and Lisa continued to show their support for Ariana all Coachella weekend. The three stars were photographed rocking pieces from the singer's special NASA merch collection, launched in celebration of the diva's headlining Coachella sets. (See the photo at the top of this story.)

May 2019 - BLACKPINK pay tribute to Manchester victims

During their performance in Manchester, BLACKPINK shared a message of support to the victims from the terrorist attack outside Grande's 2017 concert. The group also opted to not perform certain songs from their setlist in case it would be triggering or upsetting to those in attendance.

“the girls paid respect to the victims of the manchester attack by not performing certain songs that could remind people of the tragedy of two years ago” cr. annascup Thank you BLACKPINK.

pc. Ctto#BLACKPINK #BLACKPINKinMANCHESTER @ygofficialblink pic.twitter.com/cbMozo0gGy — BLACKPINK BILLBOARD---- (@bpbillboard) May 21, 2019

May 2019 - Ariana sends Rosé her Cloud perfume

Fans loved seeing the BP and Ari friendship going strong when Rosé posted a thank you note on her Instagram Story to Ariana for sending her a bottle of the singer's Cloud perfume. Ariana wrote back an adorable "love you" soldifiying this friendship is only growing stronger as each woman hit new heights in their careers.