Avril Lavigne -- 'I Got Attacked ... My Face is F**ked'

Avril Lavigne says she's a bloody mess after being jumped by 5 people last night -- explaining, "My face is f**ked."

TMZ broke the story ... Avril was involved in a fight outside the Hollywood Roosevelt Hotel around 1:00 AM Sunday morning ... and her BF Brody Jenner was smashed in the head with a bottle (see the bloody aftermath below) while trying to break it up.

Now, Avril is speaking out about the incident -- saying, "I don't fight. I don't believe in it. To clear things up I got attacked by 5 people last night out of nowhere. Not cool. My face is f**ked."

She added, "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."

By the time cops got to the scene -- the alleged combatants had all left the scene (including Avril) -- though Brody stuck around and talked with police.