Smiley Face (2007)

Anna Faris unknowingly eats an entire batch of her weird roommate's pot cupcakes and tries to get the money to buy weed to make a replacement batch, all while going about her normal day (which includes auditioning for a casting director played by Jane Lynch). Anna Faris should have won an Oscar for her commitment to being incredibly stoned. Her performance is 100% charming and 100% gross. Slack-jawed munchies gremlin. Something something female gaze. Watch stoned. Or don't watch stoned. Idk.