Ariana Grande may have a new hit single out in the form of "7 Rings."
But the beloved pop star took a moment away from celebrating this professional success on Saturday in order to mourn a personal loss.
We're talking, of course, about Mac Miller.
On the occasion of what would have been her ex-boyfriend's 27th birthday, Grande took to Twitter and posted a very simple and very heartfelt message.
It read: miss u.
Grande posted the message right after the clock struck midnight.
Miller was found dead of a suspected drug overdose in September of 2018.
He had been battling a substance abuse problem for many years prior to his passing, with Ariana crushed that she was unable to help Miller turn his life around.
About a week after this tragedy, Grande shared a video of Mac telling a story while they ate dinner together.
"i adored you from the day i met you when i was nineteen and i always will. i can't believe you aren't here anymore. i really can't wrap my head around it. we talked about this. so many times," she captioned it.
And she added:
"i'm so mad, i'm so sad i don't know what to do. you were my dearest friend. for so long. above anything else. i'm so sorry i couldn't fix or take your pain away.
i really wanted to. the kindest, sweetest soul with demons he never deserved. i hope you're okay now. rest."
While Ariana has mostly chosen to mourn Miller in private, she did post about him again on social media just days after releasing her previous smash song "Thank U, Next."
This was the track on which she sang about her exes, including Miller and ex-fiancé Pete Davidson.
"Wish I could say, 'Thank you' to Malcolm / 'Cause he was an angel," Grande sings at the outset of the single.
Not long after Miller died, Grande started to date Pete Davidson.
They got engaged after just a few weeks and then went through a very public break-up.
Along with Grande, meanwhile, many others stars paid tribute to Miller on Saturday.
Wrote Juicy J, for example:
Happy bday to my brother Mac Miller i miss my bro every day.
We continue to send our condolences to Miller's loved ones, friends and family members.
May he rest in peace.