More on the ABDC VMA Challenge to air 9/13

According to TV Guide: on Sunday September 13, America's Best Dance Crew will air just before the 1-hour VMA Red Carpet program. So, on the East Coast, ABDC airs at 7 pm. The description: "The crews pay tribute to the most memorable Video Music Award performances of all time." Any guesses on what they'll 'pay tribute' to?