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 "I Think We're Alone Now."

Kim, Kourtney and Khloé Kardashian stunned fans with a festive throwback to their childhood, check out the musical moment

Kourtney Kardashian took to social media on Sunday to share a throwback video clip featuring her and sisters Khloe and Kim Kardashian.

Kourtney Kardashian recently shared a throwback clip where she and her sisters Kim and Khloé all dressed up and dancing to "I Think We're Alone Now" by Tiffany. The eldest Kardashian playfully hinted at the true standout among them,