Lady Gaga was attacked earlier by Kelly Osbourne for being a big hypocrite in the US edition of Cosmopolitan magazine.

The singer-actor that will appear in the upcoming action thriller Machete Kills had been in discord with the Dancing with the Stars third place winner since she last accused Fashion Police for its bullying critiques of celebrities' dress.

Kelly Osbourne retorts saying, "I loved Lady Gaga. I totally believed in everything she stood for, until I realized she's a great hypocrite."

Osbourne details that the Bad Romance singer's fans have been sending her death threats, and she has done nothing to stop it.

"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. You can say whatever you want with your millions of monsters."

When commenting on Lady Gaga's personality, Kelly says, "I know the truth. Your bells and whistles mean nothing to me."

Osbourne even goes to the lengths to say, "You're feeding on the freaks and the geeks to further your career? Do you really care about the gay community? Because if you did, you'd stand up for it more than you do."

Sharon, mother of Kelly, also weighed in and fiercely called Gaga "a publicly seeking hypocrite and an attention seeker."

Kelly, however, has been in recent tabloids over her latest boyfriend, Matthew Mosshart. "He just wants to love me, and I just wanted to be loved by him. Every single other guy I've dated has wanted something from me."

She also commented however, that she wants to have kids, but don't want to carry them in her womb.

Kelly Osbourne has participated in the launch of Give a Damn, a campaign founded by Cyndi Lauper to bring greater awareness of the discrimination for gays, lesbians, bisexual, and transgender individuals in the LGBT community as part of her True Colours Fund.