Demi Lovato was banned from seeing her sister when she was on drugs.

The 25-year-old singer ''hit rock bottom'' when she was forbidden by her parents from seeing her sibling, and the star admitted her family's intervention made her realise she needed to seek help for her addictions.

She said: ''There were a few [interventions by family and friends] but the final one, everyone was like, 'We are no longer going to leave. We are leaving.' That was the moment when I thought, 'OK I really need to get help and get sober.'

''This time I knew ... I had hit rock bottom and I just needed to do this for myself. I knew that I had a lot of life ahead of me but one of the main reasons of getting sober was so that I could be around my little sister because my mum and dad [said I couldn't be around her] if I was doing stuff.

''So, I got the help I needed and now I co-own a treatment centre.''

The 'Sorry Not Sorry' hitmaker has been sober for five-and-a-half years and admits it is ''so much easier'' not to think about any temptations she might have as she has got older.

Speaking on 'The Jonathan Ross Show', which will air on Saturday (30.09.17) on ITV, she added: ''There are days when you fight temptation for sure but those days get further and further apart. I've been sober for five and a half years now and it gets a lot easier. It's so much easier than it was at the beginning and now there are days when I don't even think about it.

''I just don't put myself in certain situations that I know there is going to be a ton of alcohol or possibly drugs there, I just try not to be around them.''

Demi has previously revealed she used to sneak drugs onto planes during a spell in her life when she ''couldn't go 30 minutes to an hour without cocaine''.

She once said: ''Something I've never talked about before - but with my drug use I could hide it to where I would sneak drugs.

''I couldn't go without 30 minutes to an hour without cocaine and I would bring it on airplanes.

''I would smuggle it basically and just wait until everyone in first class would go to sleep and I would do it right there. I'd sneak to the bathroom and I'd do it.

''That's how difficult it got and that was even with somebody [with me], I had a sober companion, somebody who was watching me 24/7 and living with me [and] I was able to hide it from them as well.''