Sophie Laboissonniere of Richmond, BC, who also faces a charge of break and enter, did not appear in court.
The break and enter charge will be stayed after sentencing is complete.
"Compared to the vast majority of the people charged here, her participation in this riot was at the low end of the scale," said lawyer David Baker, lawyer for the 2011 Miss Coastal Vancouver pageant contestant, adding client did not come to court because she wanted to avoid the media spotlight.
"She's received a level of notoriety that goes way beyond the offence she committed - she's stuck with that for a long time."
The Crown requested a psychological evaluation.
Baker emphasized the psychological evaluation was not something he asked for.