Music R&B

What song did John Legend sing with Fergie on the 2006 album "The Dutchess"?

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Who co-wrote and is featured on Ciara's 2009 single "Love Sex Magic"?
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Who besides Martin Luther King, does Michael mention in "They Don't Care About Us"?
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Who did Justin Timberlake collaborate with on "My Style"?
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In Aaliyah's song "Back and Forth", what does she want the DJ to do?
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What is the lead single from Usher's eighth album "UR"?
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Who unexpectedly released an album on December 13, 2013?
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Generally speaking, which word would you use to describe R&B music?
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In Black Eyed Peas' "My Humps", you can be my what?
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