Lindsay Lohan may have said 100 times that she’s serious about getting sober and turning her life around, but this time it is for real. How do we know? Today, she sent Hollywood a sign. No, not by showing up to take a mandatory urine test at the Santa Monica courthouse. By changing her hair back to a natural color. And when we see her jogging on the beach or hanging out with Tom Cruise, well, then we’ll know she’s ready to work again.