Lady Gaga is a 'great big hypocrite,' Kelly Osbourne tells Cosmo

Kelly Osbourne has resurrected her months-long feud with Lady Gaga in the latest issue of Cosmopolitan magazine, calling the 27-year-old pop star a "great big hypocrite" who is using the gay community to "further her career."

"I loved Lady Gaga. I totally believed in everything she stood for, until I realized she's a great big hypocrite," the 28-year-old "Fashion Police" host and July cover girl told Cosmo.

According to Zap2It, the feud started when Osbourne criticized Gaga for disappointing fans by ditching the Grammy Awards red carpet in 2012. Osbourne later said that Gaga's fans sent cruel messages to her about her weight.

"Don't say, 'When you see bullying, intervene,' while letting your fans send me death threats. If my fans did that, I would not stand for it," Osbourne said.

"You can say whatever you want with your millions of monsters," she added, in reference to Lady Gaga's affectionate name for her fans.

Osbourne also addressed her father's recent relapse, telling the magazine that she was proud of Ozzy for being honest about his substance abuse issues.