Which of the following is one of Justin Bieber's absolute favorite musicians?

Explanation

Justin Bieber's favorite music: R&B (music genre), Pop (music genre), Michael Jackson (singer), Usher (musician), BoysIIMen (band), Stevie Wonder (musician), Man in the Mirror (Michael Jackson song), Thriller (Michael Jackson album), Twilight saga (books), So Sick by Ne-Yo (song), Fool To Love You (John Mayor song), You Got It Bad (Usher song).