Jessie J thinks fellow songstress Adele is an "unstoppable character".

The UK stars attended the BRIT school together when they were younger and Jessie says chart-topping singer Adele was a force to be reckoned with right from the word go.

In an interview with British magazine Hello! she explained: ''Adele is like this unstoppable character. She's amazing. I remember being at school with her and she had this aura about her that was a star and I'm really proud of her.

She added: "It's like females UK, everyone is doing so well at the moment.''

Jessie is currently promoting her second album 'Alive'. The star is proud to have written a deeply personal song for the upcoming record.

She said: ''It's very emotional, very personal. It's about a family member of mine who isn't themselves anymore. They're still alive but not themselves, in the sense that illness has taken them away a little bit.

Jessie added: "And I needed to write a song about it. I don't think I'd be able to sing it live, and I hope my fans respect that. But I gave my all in the vocals so that they have that, it sounds like a live performance.''

Watch Jessie J's music video for 'It's My Party' below: