Rihanna & Chris Brown Reconnect on Twitter

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Rihanna and Chris Brown are keeping up with each other via Twitter. Over the weekend, the two began following each other on the social networking site.

It's not known whether Brown started following Rihanna or did she follow Brown first? Either way, twitter is abuzz over their new friendship.

One fan tweeted, "I never thought you would go back to him! You better not, its your life but you do have ppl that look up to you. e.g. young girls.”

Rihanna responded to the fan via twitter, "its f****n twitter, not the alter! calm down."

The singer later apologized for her harsh reaction, "babygirl, I'm sorry, I didn't mean to hurt or offend u! Just needed to make it clear to the Navy! I still Stan for u xoxo."

Brown was sentenced in 2009 to five years probation and six months of community service for assaulting Rihanna. She asked a judge in February to lessen the restraining order against her ex-boyfriend to level one, which allows him to contact her as long as he does not harass her.

Rihanna's "Loud" tour kicks off in Baltimore, Maryland on June 4, 2011.