When Miranda Lambert was a child, her parents were private investigators who frequently took in abused women. Witnessing the pain those victims endured at the hands of the men who were supposed to love and protect them, the country star was inspired to write songs like 'Gunpowder and Lead,' about getting revenge against an abuser.

Her passion for the fight against domestic violence is what sparked Miranda's outrage at last week's Grammy Awards, which saw two performances from and a win for Chris Brown. It was just three years ago that the pop/R&B star was arrested for physically assaulting then-girlfriend Rihanna.

"Chris Brown twice? I don't get it," Miranda tweeted the morning after the Grammys. "He beat on a girl ... Not cool that we act like that didn't happen. He needs to listen to Gunpowder and lead and be put back in his place. Not at the Grammys."

"Hate all you want becuz I got a grammy now! That's the ultimate f--- off," Chris tweeted that same day. (The tweet has since been removed.) Though it's not clear whether that was in direct response to Miranda, she probably took it as so. "For all who are asking ... I have a Grammy too," she tweeted back.

Miranda continued her tirade on Tuesday and Wednesday of last week, posting, "You've got to stand for something or you'll fall for anything," along with, "Be who u are and stand for what you believe in. NO MATTER WHAT!"

On Thursday, the reigning CMA Female Vocalist of the Year further shared her fury with a live audience, bashing Chris on stage during her show at the University of Massachusetts. Before launching into 'Gunpowder and Lead,' she held up a neon green poster that said, "Take notes Chris Brown."

"I've been in a world of hurt with Chris Brown fans lately," Miranda told her audience (quote via the New York Daily News). "But see, I just have to speak my mind because where I come from, beating up on a woman is never OK ... So that's why my daddy taught me early on in life how to use a shotgun."

Chris' response to this news from Massachusetts was filled with sarcasm: "Using my name to get publicity? I love it! Perform your heart out!" he tweeted, followed by his only direct mention of Miranda: "Go buy @miranda_lambert album! So motivational and 'PERFECT'!"

Chris then thanked his fans, along with another jab at Miranda and her supporters, posting, "Goodnight to all the people who live life and who aren't stuck in the past!"

The Virginia native is still on supervised probation for assaulting Rihanna the night before the 2009 Grammy Awards, but the restraining order against him has been lifted. He has completed domestic violence and anger management classes but still has community service and two more years of probation to fulfill.

In a surprising twist, Chris and Rihanna have released two new songs together. On her 24th birthday Monday (Feb. 20), Rihanna released a remix of 'Birthday Cake,' featuring a verse from her ex-boyfriend. That very same day, Chris released a remix of his 'Turn Up the Music,' featuring Rihanna. The two are undoubtedly friends again, with some speculating they are also romantically linked once again.

Watch a Report on the New Rihanna/Chris Brown Music

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Chris Brown and Rihanna Turn Up the Music

Watch Miranda Lambert's 'Kerosene' Video