What is with the Kardashian girls' obsession with bad boy rappers?!

Kendall and Kylie Jenner have been known to run with some of hip hop's biggest names, and now we know why! Apparently, Kendall is crushing hard on Chris Brown, even though he's back on with girlfriend Karrueche Tran, and is holding out hope that something will happen between them! Meanwhile, Kylie is rumored to be dating Tyga, who recently called it quits with Kim K's bestie Blac Chyna. Scandalous!

The 18-year-old model has been hard at work walking in Paris and New York Fashion Week, so she's had no time for dating, but sparks flew with Breezy when they both attended an MTV Video Music Awards after party in late August. "She's obsessed with Chris!" a source dished to Us Weekly. CB also "thinks she's really cute", according to the source.

Her 17-year-old sister is allegedly "hooking up" with 24-year-old rapper Tyga, even though he has previously denied those reports. The possible lovebirds have been spotted together on multiple occasions, most recently at Katsuya for dinner and Universal Studios on September 20.

While we have no doubt overprotective dad Bruce Jenner isn't pleased, we're slightly shocked that Kris Jenner isn't thrilled either. After all, the momager is such a fame whore we assumed she would be ecstatic! "She [Kris] hates that they're into bad boys," an insider adds.

Guess we'll have to wait and see how this unfolds!