"miss u," she wrote.
It didn’t take long for her fans to understand Ariana’s words, replying to her with comforting messages.
"we love u endlessly & know he is EXTREMELY proud of u," one fan wrote. "he looks at you from above and loves you. he always protects you and cherishes you, keeps a good memory of your moments ♡," another posted.
"Take care of yourself today pls! Surround yourself with your close family and friends! It’s going to be a hard day but never forget how much Malcolm loved you! He’s watching over you so proud! Stay strong I love you."