Soloists (in order of appearance) * Justin Bieber* Nicole Scherzinger* Jennifer Hudson* Jennifer Nettles* Josh Groban* Tony Bennett* Mary J. Blige* Michael Jackson* Janet Jackson* Barbra Streisand * Miley Cyrus* Enrique Iglesias* Jamie Foxx* Wyclef Jean * Adam Levine* P!nk* BeBe Winans* Michael Jackson * Usher* Celine Dion* Fergie* Nick Jonas (of Jonas Brothers)* Toni Braxton* Mary Mary* Isaac Slade* Lil Wayne* Carlos Santana (solo with a guitar)* Akon* T-Pain * LL Cool J* * Snoop Dogg* Busta Rhym
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