Ellie Goulding was an ''absolute rebel'' when she was younger.

The 'Anything Could Happen' singer went through an anti-establishment period in her teens, which informed her darker lyrics in more recent years.

She said: ''I guess I was made out to be like a really good role model. Sensible, girly, flowery and blonde - but that wasn't me. I've always been an absolute rebel. When I was in my teen years I had piercings and wore all black.

''I smoked and drank and did what all my mates did around me. I was never a 'sensible one'.

''And my lyrics have always been dark. It's just that [with new album 'Halcyon'], the music is more raw around the edges and varies from song to song.''

The 25-year-old singer - who is dating electronic musician Skrillex - has been a hit in the US, but says she had to toughen up her image.

She added: ''I've changed the way I look a bit but not intentionally. I've cut my hair. I've got a bit of pink in it and lately I've become a bit monochrome, wearing a lot of black and white.

''There's definitely something switched in me in that I don't like to wear bright colours.

''I instinctively dress a bit tougher because I've spent a lot of time in the US and I realised there was a certain image projected of me here.''

Ellie's second album, 'Halcyon' is out now.