Singer Joe Jonas, of the Jonas Brothers fame, has revealed that 'Skyscraper' beauty Demi Lovato had a lot more going on than mental health issues and an eating disorder when they were dating. 

Speaking to New York Magazine, he explained that she was battling a drug addiction at the time: "One relationship that meant a lot to fans was the one I had with Demi Lovato, who I've known for years. We had been friends forever, we were both Disney kids - we eventually dated for a month."

"I really got to know her and got to see the ins and outs of what she was struggling with, like drug abuse. I felt like I needed to take care of her, but at the same time I was living a lie, because I wasn't happy but felt like I had to stay in it for her, because she needed help."

He then added that the incident where Lovato punched someone brought everything to a head and she was admitted to rehab, but the press thought that the Jonas Brothers had booted her off their tour:

"It was an insane situation to be in. Things kept building up, and Demi ended up punching a girl in the face on a plane, because she thought the girl was blaming her for something. Everybody gasped, and the girl just started bleeding.

"That's when her team and her family told her, 'You need to go into rehab.' I remember being in South America, and fans immediately jumped to the conclusion that we kicked her off the 2010 tour, and they just hated on us for it."