Chris Brown parties with ex Karrueche Tran

It had been reported that Brown had ditched Tran after reuniting with ex-girlfriend Rihanna.

If that's the case, the R&B singer could find himself in hot water with the superstar when she finds out he's been partying with Tran.

Brown turned up at the GreyStone Manor Halloween bash sporting ghoulish face paint, a baseball jersey, black jeans and trainers.

Tran opted for a more glamorous look, donning a stunning oriental red dress.

Dead man walking ... Chris Brown

INFphoto.com

In a bid to guard herself from all the attention, she chatted on her mobile phone as she left the swanky shindig.

The duo arrived and left in separate vehicles but both were in jovial spirits.

Their joint presence adds another strange twist to the Brown-Rihanna-Tran love triangle.

Last week, Brown and Tran were spotted leaving the singer's Los Angeles home looking worse for wear.

Phone frolics ... Karrueche Tran

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They sped off to a nearby recording studio, with Brown stopping to pay for model Tran's petrol.

Rihanna also tweeted a cryptic message that could have been directed at Brown, who infamously assaulted her in 2009.

She wrote: "No matter how 'busy' a person is, if they really care, they will always find the time for you."

RastaMonk