"Foolin'" is a 1983 single by English heavy metal band Def Leppard from their diamond album Pyromania. When released as a single later that year, it reached #9 on the Mainstream Rock chart and #28 on the US Billboard Hot 100. Cash Box said "Foolin'" has "structural similarities to [earlier Def Leppard single] 'Photograph' and follows in that single’s skillful pop blend of melodicism and metallicism."