"Pieces of Me" is the debut single by American pop/rock singer Ashlee Simpson and the first single from her debut album, Autobiography (2004). The song, which was jointly written and composed by Simpson, Kara DioGuardi and John Shanks, and produced by Shanks,[1] is a blend of pop and rock with lyrics about finding comfort and happiness in a relationship with a new boyfriend. "Pieces of Me" was released as the first single from Autobiography on May 17, 2004 (see 2004 in music), prior to the album's release in July; it peaked at number five in the United States (on the Billboard Hot 100), and contributed to the considerable success of Autobiography, which went triple platinum in the U.S. Outside of the U.S., the song enjoyed some chart success as well, reaching the top ten in a number of countries. In 2017, Billboard ranked the song number 97 in an article of The 100 Greatest Choruses of the 21st Century. As of 2018, it remains Simpson's most successful song, as well as her only song to reach the top ten on the Billboard Hot 100 or the UK Singles Chart.