The tribute followed designer Alex Perry, who also remembered his dear friend.
Sweet: 'The last 7 years when this date comes around, I feel like I want to say something profound about suicide and losing one of the most special people in my life,' she began
He wrote: 'Years ago we lost our beautiful Charlotte. It doesn't get any easier. I know she's a beautiful angel now, but I'd prefer that she was still here with us, delivering her special kind of magic and irrepressible laughter.
'Her family and friends will never stop the fight against online hate speech, threats, and abuse, if you ever sent Charlotte a message of this kind... You have blood on your hands. Rest with the highest my friend'.