The 29-year-old star, who has been vocal about her desire to remove most of her tattoos, posted a video, where a huge ink on forearm is being erased by a laser treatment, reported Daily mirror.
"Not looking forward to this afternoon ... I'm getting my first tattoo removal! Its going to burn like the snap of 1000 rubber bands!," Osbourne tweeted.
"I did the crime I am now doing the time! No pain no gain," she added.
The accompanying video shows the design visibly fading under the laser's rays as the singer is heard laughing hysterically through the pain and moaning "Oh god!".