Spark is planning tattoos to mark each stage of her career.

The 'Revolving' singer got her first etching to symbolise one of her lyrics, and said she's considering covering herself in inkings to mark her progress.

She explained to BANG Showbiz: "I have a Tattoo of a key, I got it when I signed my record deal. It's from the song 'Keeper' and it's to symbolise the line, 'locked in my heart', because it's a key with a heart on the top.

"I was going to get them to mark each special moment in my career, my second when I signed my publishing deal, one when my album's released - key moments in my life.

"But I don't know. I would want them to be special, mine's very personal and very special for me, but people are always asking about it. It's either no more or I get covered. If I get more than this one, I'll end up with a lot."

The 19-year-old singer also admits she doesn't tell all the people she writes songs about they appear in her lyrics.

She added: "Occasionally I tell people if I've written about them, although I tend to not. Sometimes it's obvious, depending what the situation is, sometimes it's not. Some people are flattered when they find out others, well, I just don't tell them!"

Spark is presently working on tour in the UK, and is planning to release her debut album later this year.