Mischa Barton is Hippie Happy

Mischa Barton works out her hippie headband complete with white flowers while walking her dog after lunch at Joan’s on 3rd in Los Angeles on Sunday.

The 22-year-old former O.C. actress has enjoyed her recent time being single (after splitting with Taylor Locke) saying, “I’m not used to being single, but it’s really nice. It’s great, actually. Just embrace it. It’s important to breathe for a minute!”

Mischa enjoyed the Halloween party thrown by Adam Levine on Friday night, dressing up as a Christmas tree!

25+ pictures inside of Mischa Barton getting hippie happy…