There is a new twist in Rihanna's off-and-on relationship with Chris Brown. She has reportedly reunited with the rapper and plans to spend every single day in January with him."Rihanna wants to spend everyday in January with him in 2013 because she thinks that will cement their relationship. She (will) be on that whole sentimental stuff all the time," showbizspy.com quoted a source as saying.The duo were seen driving through Hollywood Jan 2, before stopping at a convenience store to grab some food."Rihanna showed her dedication to her boyfriend by wearing a shirt from his collection - Black Pyramid. It's the second day in the New Year and they just want to be posted up together and Chris cool with that," said the source.Brown was accused of physically assaulting Rihanna in 2009 and after that they parted ways. Last year they had reconciled, but their relationship yet to be stabilised.