Pop nostalgia reached a fever pitch at Madison Square Garden on Wednesday night (August 5) when Hilary Duff delivered the ultimate full-circle pop culture moment. Together, Duff and Good Charlotte launched into an explosive performance of the band’s seminal 2002 hit, “The Anthem,” sending the arena into a collective roar. For pop culture chroniclers, Duff and the 47-year-old Good Charlotte frontman share a well-documented history, having dated for two years from 2004 to 2006. That shared creative orbit made the Madison Square Garden cameo feel less like a rehearsed gimmick and more like a genuine family affair among longtime collaborators. Duff is slated to hit the stage for her second sold-out night at the Garden on Thursday, August 6, continuing a massive global run.