“I feel unhappy I am so sad. I lost the best friend I ever had,” wrote Kelly Osbourne alongside a broken heart emoji over a black background.

Hundreds of rock and heavy metal fans will gather together to pay tribute to Ozzy Osbourne in Birmingham on Saturday.

His loyal followers do, and some of them are now begging the fast food (or fast casual) restaurant chain to properly honor one of its biggest fans with a special menu addition: an "Ozzy" burrito.