LOS ANGELES-Demi Lovato is 'doing good' after her recent hospitalisation.

The 'Stone Cold' hitmaker was admitted after a suspected heroin overdose and now her good friend, Big Time Rush's Logan Henderson, insists she is doing well and is a very ''strong woman''.

He told PeopleTV's Chatter: ''I grew up with Demi Lovato. The same acting classes and friends since we were young. That was the first time I saw somebody with incredible talent. I thought, 'Woah, this is unbelievable.' ... She's doing good. I think it's going to be ... prayers and best wishes for her. She's a strong, strong female. She's a wonderful woman and she's going to be good.''

Last week, Demi broke her silence for the first time since she was admitted to hospital, where she thanked her fans for their ''positive thoughts and prayers''.

She wrote on Instagram: ''I have always been transparent about my journey with addiction. What I've learned is that this illness is not something that disappears or fades with time. It is something I must continue to overcome and have not done yet. I want to thank God for keeping me alive and well. To my fans, I am forever grateful for all of your love and support throughout this past week and beyond. Your positive thoughts and prayers have helped me navigate through this difficult time. I now need time to heal and focus on my sobriety and road to recovery. The love you have all shown will never be forgotten and I look forward to the day where I can say I came out on the other side. I will keep fighting.''