Jeffree Star is one of the most famous YouTube makeup gurus in the world. The makeup guru has been dating weed entrepreneur Nathan Schwandt for the past 5 years.

Well MTO News has learned that Nathan has broken up with Jeffree - and he left him for a WOMAN!!

According to a person close to Jeffree, the two split about a month ago - and Nathan, or Nate as he's known by friends, is now dating a pretty green-eyed woman. 

Nate has reportedly moved out of Jeffree's home and is living with his new woman - in Malibu.

Here's where it gets really messy. Jeffree and Nate were together for years and were business partners. So Nate has his name on ALL of Jeffree's businesses.

This split is going to be VERRRRRRRY MESSY!!

And Jeffree is not taking getting dumped for a woman well. Look at some of his most recent social media postings:

And Jeffree's business is suffering too. He recently pulled out of the Jeffree Star x MMMMitchell Masterclass tour "due to unforeseen personal reasons."

"It is with a heavy heart that we must regretfully inform you that due to unforeseen personal reasons, Jeffree Star is unable to travel to Europe to take part in the upcoming Jeffree Star x MMMMitchell Masterclass tour presented by Tatti Lashes," the lash brand wrote on their website.