In case you've already forgotten, here's what she looked like before:
Going blond is a hobby for the Jenner/Kardashian family. This isn't Kylie's first time at the bleach rodeo, and Khloé, Kourtney, Kim, and Kendall have all done it, too.
Kylie posted a picture of her half-sister Kourtney with a bleach blond lob (long bob), along with the caption "VIBES" before getting her own hair bleached, as an inspiration of sorts.
Clearly Jenner is feeling it and loving her new look.