Madi Diaz (born May 14, 1986) is an American singer-songwriter and musician. Diaz grew up in Lancaster County, Pennsylvania, where she was home-schooled by her Peruvian mother, Nancy, a proponent of early childhood development and the visual arts, and her Danish father, Eric, a woodworker and musician. Diaz began piano lessons at age five from her father. In her early teens, Diaz switched from piano to guitar. She was featured in Rock School, director Don Argott's 2005 documentary about the program as Madi Diaz-Svalgard.