Lovato, who earlier celebrated five-year anniversary of her own sobriety following drug and alcohol issues, is pleased Cyrus has also decided to give up using drugs.

"I am really proud of Miley. I think that it helps people to know that there are people in the spotlight that have challenges, that are faced with very stressful lives," Lovato told hollywoodreporter.com.

"I think it helps to know that recovery is possible and it's something that is so important to certain people like myself," she added.