opens up about her meltdown to for an episode of "" which is slated to air on Tuesday, September 20. The Disney star admitted to entering rehab last year for "emotional and physical issues", which was prompted by her inability to deal with sudden breakdown.
"So many things were going great in my life and then all of a sudden my personal life just went down at crazy speeds. I had a negative breakdown and it changed my life forever," Lovato told the talk show host. She added, "But I'm glad that it did, because if I had never gone into the treatment ... I don't know if, one, I'd even be sitting here today, [or] two, if I'd be alive today."