The ongoing passive-aggressive feud between Lady Gaga and the Osbournes continues, as Gaga responds to an open letter from matriarch Sharon.
The trouble started when Kelly Osbourne received death threats from some of Lady Gaga's fans, prompting the star to retalliate with an open letter that said: "It used to make me truly sad when I would hear people talk about your weight when you were younger, as I was bullied too.
"To see you blossoming into a beautiful slender woman who makes fun of others for a living [on Fashion Police] is astounding. Why not help others?"
Sharon then called her a bully over her comments, adding: "You say her work on E! with the Fashion Police is 'rooted in criticism, judgment, and rating people's beauty against one another'. Welcome to the real world."
She also called out the 'Marry The Night' singer for the vile messages some of her fans have sent Adele and Madonna in the past.
Gaga has now responded on Facebook, saying: "The 'real world' can be cruel, why not try to change it into a better place? I am an activist. Nobody takes adolescents seriously, I do.
"My letter to Kelly Osbourne was open, because her statements on cyber-bulling were public & as a youth activist I'm compelled to be involved."