She should call Selena Gomez for a shoulder to cry on!

Kendall Jenner and Justin Bieber have been the subject of romance rumors for months, but it might over before it even got going, if you believe the latest report!

In Touch has a source that claims to have witnessed the supermodel's meltdown after JB relentless hit on chicks right in front of her face at Coachella's Nylon Midnight Garden party this past weekend. The Canadian crooner was allegedly "grinding" on model Josie Canseco, and Kimmy K's sister couldn't hide her upset.

"She left crying, saying, ‘Justin’s a d-bag,’” the source dished to the mag. Making matters worse, The Biebs' treated the cat walker "like a hanger-on" the following day and "brought girl after girl to his room," the source added. Ouch!

Girls like Kenny should know that it's virtually impossible for Justin to be faithful when he has girls throwing themselves at him left and right!