Demi Lovato says touring with Nick Jonas was "amazing".

Demi Lovato and Nick Jonas

Demi Lovato and Nick Jonas

The 24-year-old pop star - who dated Nick's sibling Joe Jonas -went on the road with the former Jonas Brothers musician in June this year and it was a privilege for her to see how he has grown "creatively".

During a Twitter Q&A with her followers, the 'Cool for the Summer' hitmaker was asked what it was like to tour with Nick, and she replied: "It was amazing! He's like a brother to me so it's been great to see him grow creatively and kill it on stage #AskDemi #HHM (sic)"

Demi took part in the Q&A as part of Hispanic Heritage Month, which runs from September 15 to October 15 and aims to recognise the contributions of Hispanic and Latino Americans to society. The Q&A was organised by Remezcla, a Latin culture website, alongside Twitter Music.

Elsewhere, Demi - who released new single 'Body Say' in July - answered questions about her upcoming new album, teasing fans by saying details would be released "soon".

One fan asked what the "vibe" of her new album is, to which Demi replied: "You'll be finding out soon enough #AskDemi #HHM (sic)"

Another follower quizzed Demi on what influences were on the record, and she said: "You'll just have to wait and find out!! #AskDemi #HHM (sic)"

Whilst most of the questions were fairly light-hearted, the 'Confident' hitmaker did take a moment to respond to one fan who asked what she would like to change about the world, telling them that she would change "the stigma around mental health".

Demi has spoken openly about her own mental health struggles.

She checked into rehab in 2010 at the age of 19 to be treated for alcohol and drug abuse, as well as an eating disorder and persistent self-harming.

The singer is "currently working" with CAST Centers - a company who aim to provide mental health and wellness recovery services.

She tweeted in response to the question: "The stigma around mental health, which I'm currently working on with @CastCenters #AskDemi #HHM (sic)"