Amanda Joy Michalka ( mee-SHAH-kah; born April 10, 1991) is an American actress, voice actress, singer-songwriter, and musician. She was a model before becoming an actress and is best known as one half of the duo Aly and AJ (formerly 78Violet) with her sister Aly Michalka. AJ recorded the theme song and accompanying music video for the film Secretariat, titled "It's Who You Are". She also issued a...