After leaving The X Factor, Miller signed a recording deal with Hollywood Records
and began work on an album. Following an initial five-song EP, she delivered her 2015 full-length debut album, Not an Apology, which featured production from the Suspex, Mike Del Rio, Matt Squire, and others. The album peaked at number seven on the U.S. Billboard 200 chart, and featured the singles "Young Blood" and "Fire N Gold." Spring of 2016 brought a new single titled "Yes Girl," which featured heavily in her live sets that summer.
The following winter, Miller teased the release of her sophomore full-length album, Aurora, by issuing the first of an intended trilogy of EPs beginning with Chapter One: Blue in February 2017. Chapter Two: Red and Chapter Three: Yellow followed during the summer. In 2018 she delivered Aurora, which compiled all three of her trilogy EPs plus additional tracks, including the single "Motherlove." ~ Matt Collar