Sarah Harding has written a song about 'f***ing up'.

The former Girls Aloud singer, who has launched her solo career, has been working on ''controversial'' material but is unsure as to whether she should finish writing a certain song about her past, seemingly about her old partying lifestyle, which involved alcohol addiction and prescription drug abuse.

She exclusively told BANG Showbiz: ''I did start working on a song which was controversial. It was called 'Oh no I f***ked up again' sort of thing.

''It was probably [drawn from personal experiences]. It was called 'Make Things Right' it was a really cool song [but] I never quite finished writing it.''

The 32-year-old star, who spent time in rehab before swapping clubbing for the quiet life, insists she's still ''drawing from person experiences'' when writing music but admits she doesn't want to swear in her songs just to impress people.

Sarah explained: ''I just don't feel the need to be like, 'Oh m****r f****r', I'm not going to try and be something I'm not. I'm not a rap artist, I'm not that urban, I'm not going to swear to be cool. At the end of the day, my roots are in pop.''

The blonde beauty - who is still friends with her former band mates Cheryl Cole, Nadine Coyle, Kimberley Walsh and Nicola Roberts - has an ''eclectic'' taste in music but is sticking to what she knows best when it comes to her first solo album.

She said: ''I was a drum and bass junkie back in the day, I love rock music, blues music, I grew up with Jimi Hendrix, Bob Marley [and] The Eagles.

''Then came the 80s, then 90s, then dance music, if you look at my iPod, it's a real mish-mash of stuff. But yeah, I'm not going to start doing heavy metal.''