Washington DC, May 20 -- Jack Osbourne has strongly reacted to online criticism surrounding his weight loss, calling out body shamers in an impassioned social media video, according to E! News.

The son of Ozzy Osbourne and Sharon Osbourne addressed speculation about his health after several social media users and reports claimed he appeared "grossly underweight."

"I cannot believe I'm having to actually make this.. video," Jack said in an Instagram video. "If I see one more article written about me saying how I'm 'sick,' I'm 'grossly underweight.' 'What's going on? Health crisis Jack.' It's.. insane."

The former The Osbournes star clarified that his appearance had not changed drastically since filming I'm a Celebrity... Get Me Out of H...