Miranda Lambert and Chris Brown have been battling in a public Twitter feud since the Grammy Awards last Sunday night.

On Monday, country singer Lambert, who is married to "The Voice" co-host Blake Shelton, tweeted: "And Chris Brown Twice? I don't get it. He beat on a girl…Not cool that we act like that didn't happen"

In 2009, Brown pleaded guilty for assaulting former girlfriend Rihanna and is now serving five years of probation.

Brown was applauded by the Grammy audience, which included Rihanna, for his performance and win for best R&B album.  His performance resulted in some very disturbing tweets from fans, including things like, "I'd let Chris Brown beat me up."

Brown responded to Miranda's tweet with one he has since taken down saying, "Hate all you want because I got a grammy now! That's the ultimate f*** off"

On Wednesday Lambert tweeted back, "I'm done for now. But not for good:) nite love bugs & remember… Be who you are an stand for what u believe in. NO MATTER WHAT!"  later adding, "Oh and one more thing for all who are asking….I have a Grammy too:)"

In a concert Thursday night at the Amherst, Mass., Mullins Center, Lambert held up a handwritten poster that read, "Take notes Chris Brown" and said, "Listen, I just need to speak my mind.  Where I come from, beating up on a women is never OK."

After the crowd applauded, she added, "So that's why my daddy taught me early on in life how to use a shotgun."

She then sang her hit song "Gunpowder and Lead," which is about a woman preparing to shoot her abusive husband: "I'm goin' home, gonna load my shotgun/ Wait by the door and light a cigarette/He wants a fight well now he's got one/He ain't seen me crazy yet."

Many of Lambert's songs, like "White Liar" and "I Wanna Die" are known to bash men.

In three separate tweets yesterday, Brown fired back, "Using my name to get publicity? I love it! Perform your heart out!  Go buy @miranda_lambert!  So motivational and "PERFECT."  Goodnight to all the people who live life and who aren't stuck in the past!"

Lambert has yet to respond to Brown's tweets but Jack Osbourne, Michelle Branch and Eric Stonestreet have also expressed their disappointment in Brown's Grammy acceptance.