The Forever hitmaker was dumped by Tran in March (15) after he was revealed to have fathered a baby girl with his friend Nia Guzman last year (14), but the singer is refusing to give up on the romance and has been trying to win the model back ever since.

Brown even threatened model/actor Tyson Beckford via Twitter.com last month (May15) after becoming jealous of a photo he had posted online, showing the hunk partying with Tran in Las Vegas.

On Thursday (04Jun15), the on/off couple sparked rumours its relationship was back on after both Brown and Tran were spotted arriving separately at Playhouse nightclub in Hollywood, where the model's best friend Christina Milian was hosting a party.

They were even photographed leaving together, but it appears Brown was not welcome when he climbed into Tran's waiting car as she had him and his pals dropped off shortly afterwards.

According to TMZ.com, Brown later showed up on the doorstep of Tran's Los Angeles home and allegedly began banging on the door, yelling for his ex to let him in.

She fled her pad to seek comfort at the famous Norm's Diner nearby, but Brown is said to have showed up shortly afterwards, when the pair became engaged in a heated argument, which quickly escalated into a shouting match.

Tran reportedly ended up storming out of the restaurant alone.