She's BACK! Of course we've been following Selena Gomez around for a couple months now but Wednesday was her first OFFICIAL appearance since seeking treatment for mental health.

The singer-actress posed with fans outside the We Day California conference at LA's Forum. We Day is a youth empowerment celebration in honor of doing social good and was hosted by Neil Patrick Harris.

Selena stunned in a floor-length A-line Dior gown (pretty fancy for a daytime event!) and looked radiant. She even posted a quick clip of her prepping for the event.

Lovely lady!