She took out Sara McMann with a vicious knee to the body. Now the champion will go off to film a couple of movies before returning to defend her title once more.
There were 10 more fights on the card and a lot of talking points after the event. Many top contenders made statements on both the main and preliminary cards. Raphael Assuncao made his case for being next in line for Renan Barao's bantamweight strap, and Alexis Davis may be next up for Rousey.
Following the event, some fighters improved their position, while others took a step back.
Here is a look at the UFC 170 post-fight stock report.