In Billboard's current cover story, Selena Gomez gets candid about a number of issues -- including her health.
What Is Lupus? A Primer on Selena Gomez's Condition
Earlier this year, Gomez checked herself into an Arizona rehab facility, setting off a string of tabloid rumors. For the first time, Gomez is opening up about the real reason she needed treatment -- and it's far from what the gossip sites said.