“Clueless” star Alicia Silverstone, 49, got fans feeling nostalgic when she posted a vibrant throwback snap of her teenage self. The young star was three years away from her role as Cher Horowitz that catapulted her to ’90s teen idol status. An old letter she wrote to a friend revealed a harsh side of the movie business. Alicia Silverstone’s Throwback Letter to a Friend Holds a Dark TruthIn her throwback post, Silverstone shared a simultaneously hilarious and heartbreaking letter she had written to a childhood friend. Love ya babe, Alicia Silverstone.”After signing off, she added, “I hoe you like the pictures!