Jennifer Lopez and Ben Affleck are a united front, sticking together through the not so happy times.MORE: Jennifer Lopez's favorite anti-wrinkle eye cream is 40% off on Amazon right nowThe two were spotted out in Miami for a much more somber night out than their usual outings, as they attended a celebration of life event for a dear friend.Among many other celebrities, the couple honored the life of the late J.R. Ridinger, the Market America CEO and prominent figure on the Miami social scene, who passed away on 30 August.WATCH: Jennifer Lopez wows fans in honeymoon bathtub video MORE: Ben Affleck celebrates amazing news after wedding to Jennifer LopezThe esteemed mogul, who was 63 at the time of his death, died of a pulmonary embolism while on a yacht in Croatia.Jennifer paid tribute to him and his families the best way she knows how, by performing a song in J.R.'s honor at the event, which was held at the Faena Forum.She also took to Instagram to express her condolences to the businessman's widow, Loren Ridinger.