Last night, millennials everywhere (including Taylor Swift) freaked out because *NSYNC reunited at the VMAs onstage.

While the Backstreet Boys have reunited and even toured, *NSYNC only had one brief reunion at the MTV VMAs in 2013.

You were either Team Backstreet Boys or Team *NSYNC, and there was very little crossover. Back in the late '90s and early aughts, pop music fans divided themselves into two major camps.