Jermaine Dupri held a HUGE concert with past and present So So Def artists last night at Fox Theater in Atlanta to commemorate the 20th anniversary of the label. Jay-Z, Mariah Carey, Ludacris, Nelly, and Usher surprised fans when they joined So So Def’s Da Brat, Bow Wow, Jagged Edge, Xscape, and more onstage. Perhaps one of the more anticipated acts of the night was the reunion of Kriss Kross. Mack Daddy and Daddy Mack took the stage, in backwards clothes, to run through some of their tracks including “Jump.” Watch more below.