Credit: Kim Kardashian on Instagram Photo: Kendall Jenner, Kim Kardashian and Kylie Jenner at on April 18, 2013

Kim Kardashian took some time out of being a behind-the-scenes mom to little baby North West (who won't be little when we finally get to see her) and wished her sister Kylie Jenner a happy 16th birthday this weekend.

Credit: Kim Kardashian on Instagram Photo: Kylie Jenner Celebrates Her Sweet 16

The reality star has gotten pretty good at only surfacing on social media for special occasions like birthdays and alleged paparazzi break-ins, and made yet another photo collage for the big celebration.

We seriously can't believe that little Kylie is already 16. The youngest Kardashian — besides the new generation — was just a tiny little girl when we first met her when Keeping Up With the Kardashians premiered back in October 2007, but she has turned into a beautiful young woman now.

Kylie took to Twitter to thank her friends and family for all the birthday wishes this weekend. "Thank you to everyone for the bday wishes and making yesterday so special! Blessed!" she wrote on the social media site. "Honestly had the most amazing night."

We hope Kylie got everything she wanted for her Sweet 16! And luckily for the Kardashians, the next Sweet 16 will be for Mason Dash Disick — so that's going to be a while.

Source: Us Weekly