Mischa Barton Does the Cannes Cannes

Mischa Barton (in Matthew Williamson) attends the How To Lose Friends And Alienate People party hosted by GQ Magazine, during the 2008 Cannes Film Festival at the Festival House, Villa Khayat in France on Thursday.

Earlier today (Friday), the 22-year-old former O.C. star was seen licking her ice cream cone while walking along the Promenade de la Croisette.

Other pictures include Mischa at the premiere of Blindess on Wednesday at the Cannes Film Festival.

35+ pictures inside of Mischa Barton doing the Cannes Cannes…