My Worlds: The Collection is the first compilation album released by Canadian singer Justin Bieber. As the international alternative to the Walmart and Sam's Club exclusive My Worlds Acoustic (2010), My Worlds: The Collection was released in numerous European countries on November 19, 2010. The album consists of two discs; the first is a slightly altered version of My Worlds Acoustic, and the second is My Worlds, a compilation itself made up of Bieber's first EP My World (2009) and his first studio album, My World 2.0 (2010). In addition, the compilation also features a new song, an inspirational ballad entitled "Pray", an acoustic version of Bieber's collaboration with Jaden Smith, "Never Say Never", and remixes of his single "Somebody to Love". The new versions of the songs were produced by Bieber's music director, Dan Kanter, his vocal producer Kuk Harrell, and also record producer Rob Wells. While most professional reviewers complimented the set, several thought that its release was unneeded. The album charted moderately in Europe, reaching the top half of several countries' album charts.

My Worlds Acoustic is the debut remix album by Canadian singer Justin Bieber. It was released on November 26, 2010 and was initially sold exclusively at Walmart retail stores and Sam's Club. The album features nine acoustic versions of songs from his debut extended play, My World (2009), and first album My World 2.0 (2010), as well as a new song "Pray". The new versions of the songs were produced by Bieber's music director, Dan Kanter, his vocal producer Kuk Harrell, and also producer Rob Wells. Internationally, the set is included as a part of the compilation album, My Worlds: The Collection (2010), which included songs from the previous two releases. My Worlds Acoustic was released to iTunes, on February 8, 2011.