Never failing to make a fiery and sexy appearance at big events, Kendall and Kylie Jenner attended the iHeartRadio Music Festival at the MGM Grand Garden Arena (September 21) in Las Vegas, Nevada along with Khloe and Kourtney Kardashian.

The four sisters looked chic and fashionable, all of them wearing outfits consisting of black leather. Kylie seemed the only outlier, donning a white top with a short black skirt.

In related news, Us Weekly reports that Khloe Kardashian claims it's only a matter of time before she announces a formal split from husband Lamar Odom.

According to E! News, “Khloe isn't quite ready to file divorce papers, but she is definitely done trying to save the marriage.”