Are they or aren't they, Hayden Christensen and Rachel Bilson were spotted hiding behind their hats in LA yesterday. We haven't seen these two together for a while but somehow they keep find their way back to each other. The couple (?) was seen running errands at Best Buy - thrilling stuff here. Maybe we'll get lucky and Rachel will decide to upgrade her co-star boyfriend choices from this pseudo one to her upcoming co-star, cutie Zachary Levi.