Sure, she looked hot in her side-boob-baring top, but the 18-year-old was supposed to announce Australian band 5 Seconds of Summer, and instead, she started to say One Direction...the same band her former beau Harry Styles is in.
"Now we welcome...One," she started to say, before doubling over and dissolving into laughter. "Guys, I'm the worst reader."
She still couldn't get the band's name out, finally just saying: "They're only getting bigger! Take a look." Kendall later blamed her major flub on bad eyesight on Twitter, but we're pretty sure it's a sign she's still crushing on her ex, Harry.
"Andddd as if I wasn't nervous already!!!! #NeverLeavinMyContactsAtHomeAgain! #LOL #LessonLearned," she Tweeted. More like #NeverGettingAskedToPresentAtBillboardsAgain!