The 22-year-old singer posted a picture of himself in costume along with a group of similarly dressed friends in a car park while waving a machine gun on his Instagram page, adding the caption: "Ain't nobody F**king wit my clique!!!!#ohb"
Brown then headed to Rihanna's Halloween party at Greystones Manor in West Hollywood.
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© WENN / Michael Wright/WENN.com
It was recently reported that the former couple are back on again after they were spotted hugging and kissing at a bash in LA.
Brown was photographed being hugged by an over-zealous female partygoer as he arrived at the event yesterday evening and seemed to have ditched his gun and beard.
Celebrities dress up for Halloween:
One Direction's Liam Payne dresses as Batman and Tom Daley a fat skeleton as they celebrate Halloween at Funky Buddha nightclub.
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