More details are emerging about Rihanna hooking up with Chris Brown for her 24th birthday bash in Los Angeles on Monday.

Party goers confirmed that Breezy was in fact present at RiRi’s birthday party, “having a good time, but keeping a low profile.”

Sources, who was at the party, claim the F.A.M.E. singer made his model girlfriend Karrueche Tran waited on him outside the venue in his car.

PHOTO: Rihanna And Chris Brown Gets Cozy For Her 24th Birthday

“She was in the car looking a bit sad but waited patiently for her man,” the source said.

The next day, which happened to be Valentine day, Brown made up for it by whisking Tran to a romantic spot in Miami. The two were spotted departing Los Angeles at the LAX.

According to TMZ, sources close to Karrueche Tran said she is unfazed by the recent rash of Rihanna rumors. The source said CB and KT are now actually living together.

PHOTO: Rihanna Turn Head On The Grammy Red Carpet

TMZ wrote:

As for CB showing up to Rihanna’s birthday party, we’re told that didn’t bother Karrueche either … because he came home to her that night and whisked her to Miami the next day to celebrate Valentine’s Day.

According to our sources, Chris professes his love to Karrueche daily and he has no plans to leave her for Rihanna.