Kendall Jenner Reveals Which KarJenner Sister She Thinks Is the Worst Mom on 'The Late Late Show with James Corden'

Kendall Jenner was recently live on James Corden's "Spill Your Guts or Fill Your Guts," where she reunited with her ex, Harry Styles, and also revealed which of her sisters is the worst mom.

Kendall Jenner and singer Harry Styles were put on the spot and had to tell some hard truths when they made an appearance on the recent episode of the James Corden's show.

The "Spill Your Guts or Fill Your Guts" game is one where partakers have to truthfully answer difficult questions, or eat what is in front of them—which most times is usually gross.

The first question Harry Styles asked Kendall, who is one of the few members of her family without a child, was that she should rank her siblings, Kim, Kylie, Khloe, Kourtney, and Rob from best to worst parents.

The Kardashian-Jenner clan was in the news recently when it was reported that Caitlyn Jenner said she hadn't spoken to Khloe Kardashian in about five to six years.

Kendall first dilly-dallied with the question, saying all her siblings are great parents and then going on to rate Rob as the best parent of the lot.

When Styles pressed her to answer the question or drink 1000-year-old eggnog, Kendall rated her other siblings parenting skills from best to worst, saying:

"I'd say Rob is number one — he's so good to his daughter. And then, I mean, that's so hard they're all amazing!... Then it would be, like, Khloe, Kim, Kylie, Kourtney."

Harry Styles was standing in for James Corden on the December 10 episode of "The Late Late Show," but it was worth his time, as he and Kendall, with whom he had dated for three months in 2013, shared good chemistry on the show.

That chemistry is not surprising, considering the number of times that Harry and Kendall have been spotted having fun together in the past.

The ex-lovers have shared some amazing dates, including New Year Ski Vacations, fun trips on Ellen DeGeneres' yacht, a fun time skiing, and snowboarding in Mammoth, California, in 2014, among many more special moments.

Kendall did get the opportunity to get back at Harry Styles on the show when she asked him a question about his last album. The model asked:

"I'm dying to know this. Which songs on your last album were about me?"

The audience was cheerful of Kendall's question, but Harry Styles chose not to answer, preferring to eat cod sperm than reveal what tracks were about Kendall.

The Kardashian-Jenner clan was in the news recently when it was reported that Caitlyn Jenner said she hadn't spoken to Khloe Kardashian in about five to six years.

However, a source close to the family stated that such claims were untrue, because Khloe cared so much about her relationship with Kendall and Kylie, to want to have a good relationship with Caitlyn.

The source added that though Khloe and Caitlyn weren't the closest, the idea of them not seeing each other for five to six years was crazy. The source further said that Caitlyn wasn't close to the family either, which wasn't surprising.

All is well and good in the Kardashian-Jenner Clan, but Kourtney might want to improve her parenting ratings in the eyes of her sister, Kendall.