Chris Brown and Rihanna
Rihanna and Chris Brown at the 55th Annual Grammy Awards in 2013 (Christopher Polk/Getty Images)

Chris Brown broke up with his on-off girlfriend Karrueche Tran last month, and a new report claims the Loyal Singer is trying hard to win back his ex-girlfriend Rihanna.

Sources close to the Diamonds singer told Urban Islandz that he has been trying hard to get her back, sending her a lot of romantic text messages.

"He has been trying but will it work this time around? I highly doubt it," a source told the website.

"Rihanna has moved on from all that drama Chris bring along with him, she is in a much better place now both personally and with her career. So she is not going to entertain his vibe again," another source added.

Chris Brown and Karrueche Tran split last month after a bitter fallout. The singer accused Tran of cheating on him with rapper Drake.

Karrueche Tran and Chris Brown
Chris Brown and Karrueche Tran broke up last month.Getty

Brown took to Instagram and posted a cryptic message about the breakup, which was deleted later.

Brown wrote: "We've got scars, some of them u gave me, some of them I've caused. That ride or die act we have been fooling the world with obviously ain't working. I was locked up for damn near 4 months and only got 1 visit from you while u was hosting parties and taking secret trips to Toronto, going on dates with Drake! [sic]

"When this relationship first started u knew what it was and even participated in threesomes. I slowed all that sh*t down. So let's not try to save face for public opinion because I don't need to play victim so people can take my side. All these celebrity n*ggas ain't sh*t and focus only on themselves. I made it clear to the world who my girl was and made your life equal to mine even at the cost of me not focusing on my career at times."

He added, "So miss me wit the bullsh*t. Now yall know the real."