Chris Brown and Karreuche Tran are making it hard for people to believe they have really broken up.

The pair was spotted at the same GreyStone Manor Halloween party on Sunday night, a week after Tran spent time with him at his home.

(View pictures here.)

Tran dressed in an Oriental style dress as Brown wore a baseball jersey and black and white makeup, resembling a ghoul.

Brown and Tran left the party in separate cars, but that is not going to end the rumors. Last week, after spending time at an event with Rihanna, she and Brown also left in separate vehicles.

Earlier this month, TMZ reported that Brown ended his relationship with Tran, who he had been with for nearly two years, after publicly hanging out with Rihanna, causing many to believe they had rekindled their romance. "I don't want to see her hurt over my friendship with Rihanna,” the singer said.

“I have decided to be single to focus on my career. I love Karrueche very much but I don't want to see her hurt over my friendship with Rihanna."

"I'd rather be single allowing us to both be happy in our lives,” Brown added.

But, it seems Brown is not ready to let Tran go just yet.

A source close to Brown told HollywoodLife.com, “I know [Chris] loves Rihanna and that’s his number one, but [he] still is looking after [Tran] on the low.

I didn’t really see that [expletive] coming, but I know how it is. He’s been seeing her this past week and I guess they’re talking.

I’m not trying to say Chris is doing anything bad because I don’t think he is. It’s way complicated and [expletive]. He left [Karrueche] for Rihanna and that’s real [expletive] love right there. On the other hand, [Karrueche] is still calling and texting him and he gets weak.”

Brown spent last Monday with Tran, according to Hollywoodlife, days after Chris Brown spent the evening with Rihanna at his side for his Qubeey Channel launch party.

Though Brown and Tran drove separate cars, onlookers reported that Tran followed behind Brown and his bodyguard as they headed to a studio and spent time with him while he was recording.

Similarly, Rihanna and Brown left his event in separate cars, though during the event, they were seen sitting with one another, chatting. A source told Hollywood Life the two were also “kissing and hugging."

Though an additional source claimed that Tran was just with Brown to gather her belongings and move on, based on the fact that they are still spotted at the same events, there may be more going on between them.