You had one job, Kylie Jenner…
The 17-year-old fumbled over her words at the 2014 American Music Awards… one second after mocking sister Kendall's autocue fail from the Billboard Awards in May. Awkward! Watch the video above and squirm.
Kendall and Kylie, along with older half-sister Khloe Kardashian, presented the Favourite Pop/Rock Female to Katy Perry, who accepted the award via satellite from Australia.
Check out Kendall's original Billboards line flub below, introducing One Dir- whoops, we mean, 5 Seconds of Summer.
The Kardashian-Jenner girls had better luck on the AMAs red carpet, bringing plenty of va-va-voom with risky thigh-splits and even a touch of side-boob.
View all the red-carpet highlights in our slideshow below: