In this Feb. 22, 2014 photo, Ronda Rousey prepares for a UFC 170 mixed martial arts women's bantamweight title fight against Sara McMann in Las Vegas. Rousey is constructing her escape hatch out of mixed martial arts, even if shes not planning to use it just yet. The UFC bantamweight champion has turned her celebrity and charisma into a budding career as an action film star. Many MMA fighters dream about it, but Rousey is actually doing it: With upcoming parts in The Expendables 3, the newest Fast and Furious chapter and the Entourage movie, shes seeking success outside the cage even while her fighting career is near its peak. (AP Photo/Isaac Brekken)

Remember when Dana White made the infamous declaration that women will never fight in the UFC?

That was four years ago, and that chomping noise you hear now is White eating his own words.

This might be the biggest showcase weekend for women's MMA ever.

On Friday night, San Diego's Cris "Cyborg" Justino takes on Charmaine Tweet as the headline fight in Invicta 11, at the Shrine Auditorium in Los Angeles.

It's Justino's first fight since July 2013. She was supposed to fight in Invicta 10 last December but had to pull out after an ankle injury. She passed a drug test this week despite recent allegations from Rousey and White accusing her of PED use.

She'll be highly motivated on Friday night because a win could earn her a shot at Rousey, the current UFC women's bantamweight title holder. And after this scathing verbal attack from Rousey in November, you know Cris Cyborg wants to settle this on the mat.

Rousey accuses Cris Cyborg of PED use:

"That girl in my eyes should be charged with attempted negligent homicide... By coming into the cage with performance-enhancing drugs, [it] is the equivalent of walking in there with a weapon. It's not about who hits a ball farther or something like that. The only reason why we're allowed to do MMA is because the human potential of how it is right now, we can say that it's safe. But if you keep putting PEDs [in] people, it's going to become less and less safe."

However, Cyborg's Friday night Invicta fight is really just an appetizer for the long-anticipated Rousey vs. Cat Zingano matchup in UFC 184 on Saturday night at the Staples Center.

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Biggest weekend ever for women's MMA?