(UK #5) 1980: " It's My Turn " (US #9) 1981: " Endless Love " (with Lionel Richie ) (US #1, UK #7) 1981: " Why Do Fools Fall in Love " (US #7, UK #4) 1982: " Mirror Mirror " (US #8) 1982: "Work That Body" (UK #7) 1982: " Muscles " (US #10) 1985: