Amanda Joy Michalka ( mee-SHAH-kə; born April 10, 1991) is an American actress, musician and singer-songwriter who is best known as one half of the musical duo Aly & AJ (briefly 78violet), alongside her older sister Aly Michalka. She has appeared in films such as The Lovely Bones (2009), Secretariat (2010), Super 8 (2011), Grace Unplugged...