Christmas; the song was later re-released on Radio Disney Jingle Jams following Simpson's musical breakthrough.
Simpson later began writing and recording demos, in hopes of finding a record label.
She independently released the single "Bat for a Heart" (2012), though it failed to have success.
Simpson has since scrapped the album, and focused on her child.
Simpson had a leading role in the film Undiscovered (2005), which became a critical and commercial flop.
The failure of the film, along with multiple critically panned performances, led to much media scrutiny towards Simpson.
The success of the single and her reality show helped propel her debut album, Autobiography (2004), to the top of the Billboard 200 albums chart.
The project went on to sell over five million copies worldwide, making it her most successful album to date.
She later portrayed Roxie Hart in Chicago on Broadway.
Despite this, Simpson's second studio album, I Am Me (2005), debuted atop the Billboard 200, becoming her second album to do so.
The album went on to receive a platinum certification from the Recording Industry Association of America (RIAA).
Simpson announced her separation from Wentz in 2011, citing irreconcilable differences.
Despite having taken time to focus on being a mother, Simpson announced a fourth studio album that same year.