*Chris Brown has learned a lesson from his recent Twitter spat with Raz-B .

The singers became embroiled in a war of words after they exchanged insults on the microblogging site.

Brown later issued an apology to Raz-B to end the feud – and he’s now vowed to tone down his antics in 2011.

He writes on Twitter, “Since new years is coming up my resolution is to shut the hell up.”