Sophia Bush's OPen Campus Launch Party

Sophia Bush helps get fun started at the “OPen Campus” launch party at Mel’s Diner on Tuesday (July 7) in West Hollywood, Calif.

The 27-year-old One Tree Hill actress was joined by Brody Jenner, AnnaLynne McCord, and musicians Bow Wow and Solange Knowles.

The campaign is playfully dubbed, “OPen Campus” and the photo shoot featured the celebrity cast getting ready for the school year; cheering on the bleachers, running down the steps of the school, on the football field and hanging out on a custom Op bus.

Today (July 8) is Sophia‘s 27th birthday! Happy Birthday Sophia!!!

15+ pictures inside of Sophia Bush‘s Open Campus Launch Party…