Vegas Police Investigating Chris Brown for Alleged Battery

Chris Brown is at the center of a new assault investigation after a party in Las Vegas, TMZ reports.

In a scathing, profanity-laced video on Instagram, Brown slammed Gutierrez's allegations.

"Obviously somebody is looking to get a check or start some s-", he said. "I don't know this old looking b--". She looks old, like dusty.

TMZ filmed the model in August outside a Hollywood club, where she said singer Jason Derulo was not a "good guy", after he left with some of her friends in a party bus. "If she came to Vegas, she probably came to my room and was too ugly to get in".

Brown's rep, however, vehemently denies the allegations made by Gutierrez, calling her accusations "completely false and not based in reality", in a statement released to ET on Saturday. I'm done taking the care of grown a men. "And I'm going to be hella rich after all the lawsuits I file from these insane individuals who keep lying on my name", Brown wrote. Happy NEW YEAR! Time for some of us to grow the fk up!

However, Chris' representative insists Liziane - who did not seek medical attention and called police a few hours after leaving the party - was escorted out of the star's private afterparty for "being disruptive and out of control". Nicole Perna, a spokeswoman for the singer, said in a statement the woman's accusations are "unequivocally untrue".

While waiting for security to bring out her phone, she allegedly had a "total meltdown", which was caught on the hotel's security cameras, prompting the venue's security staff to step in and assist in removing her from the resort.

Police also said Gutierrez was escorted from the suite at the Palms Hotel by private security, and returned to the hotel later to report the incident to hotel security.

The woman filed a police report claiming that Brown hit her and took her cellphone after she tried to take a photo with him.

Brown's manager, Mike G, also added his two cents in the mix by posting a message on his Instagram account about the alleged incident.