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After enduring rumors and speculation about her extended disappearance from the limelight in 2013, Selena Gomez is happy to finally set the record straight. In her cover story for the Oct. 17 issue of Billboard magazine the 23-year-old confirms that she was diagnosed with lupus and underwent chemotherapy in secret.

"I was diagnosed with lupus, and I've been through chemotherapy. That's what my break was really about. I could've had a stroke," Gomez says in a sneak peak from the Billboard story. "I wanted so badly to say, 'You guys have no idea. I'm in chemotherapy. You're a—holes.' I locked myself away until I was confident and comfortable again."

With the chronic autoimmune disease in check, the young star is back to doing what she loves—and with a whole new attitude.

"This is my time. I've deserved this. I earned it. This is all me," she told Billboard.

Gomez appears to be running at full throttle as of late: She provided the voice for one of the main characters in the recent blockbuster Hotel Transylvania 2 and just announced a 2016 tour of the U.S. and Canada to promote her second solo album, Revival, which drops tomorrow.