On Friday, Kendall Jenner posted behind-the-scenes images and video from a photo shoot for her sister Kim Kardashian's shapewear company Skims.

One fan who saw the photos tweeted, "I have 99 problems and looking like Kendall Jenner solves them all."

Jenner saw the tweet, retweeted it, and told the commenter that she had problems too.

Another Twitter user commented: "My confidence after Kenny J said she has bad days too?"

"YES"

"YESSSS MA'AM ????" Jenner replied.

In the past, Jenner has spoken out about her body confidence, especially in regards to comparing herself to her sisters (opens in new tab).

"My sisters are much curvier than I am," Kendall said in an interview with The (opens in new tab)Telegraph (opens in new tab). 'They have boobs, but I don't have boobs. Growing up as this little twiggy girl, I looked at my sisters and always wondered, 'Oh, do I have to be sexier like them?' I felt like I didn't fit in in one part of my life."

She added that she eventually got over those fears and accepted that she and her sisters had different personalities as well.

"I like having a different vibe from everyone else. I like being different." And that's okay."