According to a sources close to Rihanna....
"Chris started texting Rihanna on her birthday [Feb. 20], and the two have been sending each other a flurry of texts ever since,"
"Rihanna didn't write back right away . . . but later that night she started getting sentimental and texted back, 'thank you,' and asked how he was," the source went on.
"Since then, the two haven't stopped texting each other and friends are freaked out that she's going to start dating him again."RiRi and Chris dated for over a year back in 2008, though the romance came to a stop in 2009 when Brown assaulted her. They got back together in Dec. 2012 and broke up again in May 2013.
We're not exactly sure where this leaves Drake, who is known to be a love rival to Chris. Drake and Rihanna have sparked speculation they're an item after a sexed up duet on stage in Paris this week as well as a string of dates.