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 Pink Be Be Winans Usher Celine Dion Fergie Nick Jonas Toni Braxton Mary Mary Isaac Slade Lil Wayne Carlos Santana Akon T Pain LL Cool J Snoop Dogg Nipsey Hussle Busta Rhymes Swizz Beatz Iyaz Mann Kanye West