What's THIS?! We spotted Juul vape in Selena Gomez's hand as she entered a Valley studio on Friday. Isn't she supposed to be careful with her health, given her Lupus and kidney transplant?!

Well it certainly seems like she's Juul'ing and we've never known her to be a smoker so we can only imagine it's for pleasure ... OR to intake CBD oil for health-related pain? Or for anxiety?

Perhaps that's an aid for mental health issues she's suffered recently. Some research claims the marijuana extract helps with anxiety and depression, so it's a natural way to treat those problems. Is that what this is???