She later attended Baldwin High School. At the age of 14, Martinez taught herself how to play guitar by studying chord diagrams of songs that she enjoyed, which she found online, and wrote her first song by adding her poetry to one of the chord diagrams, but claims that playing guitar "eventually got stale". During her sophomore year, she won the talent show at Baldwin High School. At the age of 16, after watching 101 Dalmatians, she dyed half of her hair blonde, in the same vein as Cruella De Vil. She received criticism from her classmates after appearing on The Voice.