Mischa Barton is a Guitar Hero

Mischa Barton returns home to L.A. on Friday after attending the Sundance Film Festival in Park City, Utah.

The former O.C. actress carried home the brand spankin’ new Guitar Hero video game for the Nintendo Wii.

The Wii just needs ROCKBAND now. Are you listening, Nintendo?????

Mischa turned 22-years-old yesterday. HAPPY BIRTHDAY, MISCHA!

10+ pictures inside of guitar hero Mischa Barton…