Sarah Harding has teamed up with producer Paul 'Groucho' Amykle for her next solo single.
The Girls Aloud star - who recently completed a stint in rehab for drink and prescription pill addiction - will go for a dubstep feel on the song as she is keen to produce the UK's next big club track.
A source told the Daily Mirror newspaper: "The pair met up at Kensington Park Studios last week and got stuck into working on a new sound for her.
"She really wants to make people sit up and take notice, with a single that would never have been expected from her.
"Sarah realises it's time to try something different, so she's having fun experimenting."
Earlier this year, it was reported Sarah was planning a "very raw, heartfelt" debut solo album and would be taking inspiration from the breakdown of her engagement to DJ Tom Crane and her time in rehab.
A source said: "Sarah's been jotting down lyrics and writing songs for the past few months.
"As well as writing about the breakdown of her relationship with Tom, she has detailed her time in therapy, and been pretty explicit about her battles with drink.
"There is some very raw, heartfelt stuff - not the kind of thing people will be expecting. Sarah's had some pretty wild experiences and wants the album to reflect this."