LOS ANGELES (AP) — Selena Gomez has revealed the reason she went into rehab in January 2014 was not for drugs, but for lupus. Gomez tells Billboard she wanted so badly to lash out at the people who suspected she was on drugs but she felt angry for even feeling the need to say it. She says she locked herself away until she was confident and comfortable again. Her lupus is in remission and she says she controls it with “diet, routine and medication,” and by having the right friends. Gomez’s new album, “Revival,” is out today.