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Miranda Lambert questions Chris Brown's Grammy appearance

Miranda Lambert, left, and Chris Brown at the Grammy Awards on Feb. 12, 2012. Getty

(CBS) Country star Miranda Lambert wasn't a fan of Chris Brown's appearance at Sunday night's Grammy Awards.

On Monday, the singer sent a pair of tweets questioning Brown's presence at the ceremony - where he performed twice and took home the award for best R&B album - citing his assault on then-girlfriend Rihanna in 2009.

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Here's what she shared with her more than 650,000 followers:

"Gunpowder and Lead," for those not familiar with Lambert's songs, is about avenging domestic violence.

Brown reportedly responded to critics on Tuesday with a message of his own. A screencap on shows that Brown tweeted, "HATE ALL U WANT BECUZ I GOT A GRAMMY Now! That's the ultimate F--- OFF!" That tweet has since been removed from his account.

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