Chris Brown plans lawsuit against Las Vegas party guest

Singer Chris Brown is reportedly planning to due the woman who accused him of punching her in the face at a New Year's party.

Liziane Gutierrez claims the 26-year-old R&B star attacked her when he spotted her taking a photo of him during a bash in his suite at Las Vegas resort The Palms early on Saturday, reported TMZ.

Brown's aides were quick to dismiss her allegations and play down a police investigation surrounding the reported incident.

Now sources say the singer is planning to file a defamation suit.

Brown is also using his latest legal wrangle to cut ties with friends who regularly invite "random girls" to hang out with him at parties.