'One Tree Hill's' Sophia Bush talks 'Gasoline Rainbows': 'Artists get the value of humanity'

sophia-austin-lexus-green.jpgWhen Sophia Bush and her "One Tree Hill" co-star Austin Nichols returned from their trip to Grand Isle after the Deepwater Horizon exploded and oil began to spill into the Gulf of Mexico, they found themselves disheartened... and then they turned that feeling into action.

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