Kourtney shared a nostalgic throwback video on Instagram on Sunday, December 22 of her, Kim, and Khloé from their younger years. The video features the trio performing Tiffany's iconic '80s hit ...

Suddenly, a woman is yanked through a mirror — a moment punctuated by the funniest shriek this side of the Wilhem scream — and the plot is pulled into the ’80s: a critical framing shift that’s never .