Kendall Jenner and Hailey Baldwin have been friends for a while. So it's only natural for her to care about who she decides to marry. Luckily, Jenner approves of Baldwin's choice to tie the knot with Justin Bieber.

"Whatever makes them happy, I’m happy," said Jenner on The Tonight Show Starring Jimmy Fallon. "I’ve been friends with both of them for a very long time. So everybody’s happy, and that makes me happy."

But there's still one thing Baldwin does that Jenner hates a lot. Fallon recalled when Baldwin came onto his show and opened a beer bottle with her teeth.

"I hate her for this. She makes me so nervous when she does this," says Jenner. "I yell at her every time, because it hurts my teeth. I’m like, 'I love you, but this is crazy.'"

Jenner has a party trick of her own. In a viral clip, Jenner is seen high kicking a beer can off someone's head. But when Fallon asked her to do it on the show, Jenner said she's no longer able to do it. "It could have been the height [of the person with the can on his head], but it was probably the tequila that's made this possible," explained Jenner, who said her next attempt to do it didn't go as well.

"So, I'm sitting in my bathroom by myself, and I just give it my all I throw my leg in the air, fully fly off the ground, my whole body comes off the ground," she said. "And I sat on the floor for like ten minutes just laughing at myself." 

During her time on Fallon, Jenner also danced it out with the late-night host and Paul McCartney and spoke about how she fangirls over Millie Bobby Brown.