On Thursday afternoon Justin Bieber went to Cake Mix in Los Angeles with his little sister Jazmyn, but the Biebs was also there to meet with Hailey Baldwin and Kendall Jenner. Bieber has been romantically linked to BOTH of the stunning models, so we're never really sure which one he's hooking up with. Maybe both?

Though Kendall reportedly threw a hissy fit at Coachella when the 21-year-old pop star ignored her and started flirting with other girls, it seems like she's gotten over that. A source old In Touch that Biebs was reportedly "grinding" on model Josie Canseco, and Kendall "left crying, saying, ‘Justin’s a d-bag.'" Bieber allegedly treated Kendall "like a hanger-on" and "brought girl after girl to his room," right in front of her face.

But then how is she ok with Bieber hanging with Hailey? And are the two besties or merely competing for Bieber's attention? This seems like a VERY complicated relationship...