Jenner revealed that one thing that makes her upset with Baldwin, the daughter of actor Stephen Baldwin, is when she opens beer bottles with her teeth. The discussion came up with Fallon talked about hidden talents.
"I hate her for this," Jenner told Fallon about Baldwin using her teeth as bottle openers. "She makes me so nervous. I yell at her every time. It hurts my teeth.
When Fallon chimed in and say it hurts the teeth of "everyone here, too," Jenner continued.
"I said, 'I love you but this has got to … this is crazy. … She's amazing but I get so angry at her when she does it. 'You're so pretty, don't (expletive) your teeth up," Jenner added.
Entertainment Tonight reported that the Baldwin, 21, and Bieber, 24, were in town for New York Fashion Week as well, spotted holding hands Thursday as they walked to the "Los Angeles" fashion show by John Elliott at the Pier 62 skatepark.
Bieber revealed on social media July 9 that he and Baldwin were officially engaged.