Breezy took to the social-networking site to congratulate RiRi on turning 24 today (20th February) - which saw the Bajan babe quickly respond to her former beau, who assaulted her back in 2009.
Addressing Rihanna by her real name, Chris wrote on his official page: "HAPPY BIRTHDAY ROBYN!"
The We Found Love hitmaker then retweeted his message, simply adding: "Thanks!" on the end of Brown's tweet.
The 22-year old is rumoured to have worked with RiRi on her new single, a remix of Talk That Talk track Birthday Cake, with Hot 97's Miss Info reporting that he's recorded two verses for the song.
Birthday Cake remix producers Da Internz recently revealed that the You Da One singer's new single will feature a collaborator that will "shock the world" - with fingers instantly being pointed at Brown.
After the ceremony on 12th February, Lambert tweeted: "I don't get it. 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."
Brown has now accused Miranda of using his name to generate press, stating on Twitter: "Using my name to get publicity? I love it! Perform your heart out!"
He sarcastically added: "Go buy @miranda_lambert album! So motivational and 'PERFECT'!"
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