Credit: @chrisbrown/Twitter

Terrorist? Gunman? Poster boy for big pants? It's not clear what Chris Brown dressed up as for Halloween, but judging by the guns, beards, and ammunition belts worn by him and his "clique," as he referred to them on Instagram, it wasn't an entirely appropriate costume choice for someone who was famously charged for attacking Rihanna, or for that matter, anyone.

Brown changed to attend Rihanna's Halloween party in West Hollywood, donning a turban and a more elaborate ammo-robe. His rep didn't immediately respond to questions about his costumes, but Brown's mom tweeted, "HALLOWEEN IS FOR FUN NOTHING MORE THAN JUST FUN. GET A LIFE PLEASE."

PHOTOS: Stars Celebrate Halloween

Brown might have fared better with a timely - yet still fun! - outfit like the one worn by Gwen Stefani. Among the catwomen, sexy unicorns, and other scantily clad stars, the No Doubt front woman stood out as a bullet-wounded Sandy from "Grease," embodying what many east coasters would like to do to a hurricane that shared the same name.

Press Association via AP Images