Obviously, a few of the show's more successful stars like Amanda Bynes, Nick Cannon, Jamie Lynn Spears, and Kenan Thompson weren't in attendance, but the former child stars who did show up treated fans to something beyond incredible…
They sang the theme song live!!!
It's what '90s children's dreams are made of.
Ch-ch-check out the cast of All That singing the theme song more than two decades after its premiere (below)!!!