Courtney Love is serious about her sobriety, and she's not about to let her detractors claim otherwise.

After hearing that Kelly Osbourne had made a joke about Love's past drug abuse on E!'s 'Fashion Police,' the rocker took to online video site VYou to clear things up.

In response to a fan's question about the length of her sobriety, Love answered, "The answer is '05. Since October '05."

Love went on to explain how hurt she was by Osbourne's comments, saying, "Kelly Osbourne and Joan Rivers called me a crackhead on the E! channel. Kelly knows I'm sober. Kelly knows there's no drugs allowed at my house. I think it's really lame."