The 27-year-old Complicated hitmaker and her boyfriend, reality TV star Jenner were enjoying a night out at the Hollywood Roosevelt Hotel when Lavigne allegedly became involved in an argument with another woman, which resulted in a black eye and a bloody nose, reported TMZ online.
Jenner reportedly attempted to intervene and was allegedly struck on the head with a bottle during the commotion. He later sought hospital treatment for his injuries.
"I don't fight. I don't believe in it. To clear things up I got attacked by five people last night out of nowhere. Not cool. My face is terrible. As in black eye, bloody nose, hair ripped out, scratches, bruises and cuts. So not OK to be abusive to others. Violence is never the answer," Lavigne wrote on her Twitter account.
"Interesting Saturday night... Just got (out) of the hospital with a new scar on my face... Charges/chargers," Jenner added.
Published 07 November 2011, 12:25 IST