Miranda Lambert Attacks Chris Brown Over Twitter

Singer uses social network to speak out against Brown's Grammy appearance.
2:40 | 02/18/12

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Transcript for Miranda Lambert Attacks Chris Brown Over Twitter
A celebrity smack down between two Grammy winners country superstar Miranda Lambert is going on the attack right from the concert stage after Chris Brown's big win at the grammys. And brown known in -- for assaulting his ex girlfriend Rihanna is not backing down ABC's Dan -- -- is all over this. Celebrity feud this morning good morning to you and good morning to both of you it is definitely getting very heated from this Lambert. May have fired the first tweet but brown not letting her have the last word he's got a problem with her bringing up his past and he's telling the world. In less than a 140 characters. Yeah. That there has been. Country superstar Miranda Lambert now taking her crusade against Chris Brown to center stage holding this sign. She railed against him at a concert Thursday night. She's angry about this Chris Brown. Who pled guilty. To assaulting his then girlfriend Rihanna for years ago now getting. Rapturous applause at the -- this past transgressions seemingly forgotten. She says it's unacceptable. It's the -- shotgun blast from Lambert who spent the week. Tearing into brown over Twitter. After not one but two Grammy performances from him she fired off this. Chris Brown twice I don't get it -- beat on a girl not cool that we act like that didn't happen. But after nabbing best R&B album of the year round fired back. Hate all you want because I got a Grammy now that's the ultimate expletive off. And now there are new reports that Rihanna may -- taking Chris back. He was seen at a birthday party this week and he reported -- featured prominently in a song in her soon to be released single. For Lambert she's not backing down -- -- -- who you walk and stand for what you believe and no matter -- -- and one more thing for all who are asking. I have a Grammy to. And just this morning browns took a shot at Lambert's onstage rant. Using my name to get publicity I'd love it perform your heart out. To the ball now in Lambert's court because brown tweeted this go by at Miranda Lambert albums so motivational. And perfect. Now. Lambert hasn't tweeted about this since Wednesday but. With this latest sarcastic dig -- have to see if she's gonna return fire doesn't gonna go away anytime soon.

This transcript has been automatically generated and may not be 100% accurate.

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