premise: Chaka Khan is an artist that only makes pop music.
hypothesis: Chaka Khan ( born Yvette Marie Stevens , March 23 , 1953 ) is an American recording artist whose career has spanned five decades , beginning in the 1970s as the frontwoman and focal point of the funk band Rufus . In 2015 , she was nominated for induction into the Rock and Roll Hall of Fame for the second time ; she was previously nominated as member of Rufus in 2011 . Khan was the first R&B artist to have a crossover hit featuring a rapper , with `` I Feel for You '' in 1984 . In December 2016 , Billboard magazine ranked her as the 65th most successful dance artist of all time . `` Sweet Thing '' is a song performed by American funk and R&B band Rufus with vocals by American singer Chaka Khan , also a member of the band .