Finn Wolfhard, Caleb McLaughlin, Noah Schnapp, and Gaten Matarazzo face a lot of weird stuff in Stranger Things — but nothing weirder than late night!
In a Behind The Music-style mockumentary, James Corden and the boys start a Motown group because they all went to elementary school together? LOLz!
But it’s all just a ridiculous explanation for a reunion in which the quintet sings a medley of I Want You Back, My Girl, and Reach Out I’ll Be There LIVE onstage.
Ch-ch-check out first and only performance by The Upside-Downs (above)!