She's co-written some of the best breakup songs of all time. If you don't know her face, you almost certainly know the words she helped write for Ariana Grande that got her nominated for a Grammy or the songs she co-wrote for Christina Aguilera and Janelle Monáe. Eve Jackson speaks to Tayla Parx about her transition from child actor in "Hairspray", "Gilmore Girls" and "True Jackson, VP" to being dubbed the secret weapon behind radio's top 40 and her second solo album "Coping Mechanisms".