The singer revealed that Xenomania's songwriting methods are not restricted by rules and she initially found it difficult to pen a traditional track.
Roberts told the Daily Star: "For about four months I tried to learn how to write like a normal songwriter.
"Xenomania don't have any rules – they take the verse from one song, the chorus from another and merge them. The first few writers I tried working with were like, 'That's not how a song is written'. They had so many rules."
Roberts has lead writing credits on 11 of 12 of her debut album Cinderella Eyes' tracks, having teamed up with Metronomy's Joseph Mount and The Horrors producer Dimitri Tikovoi.
However, the Girls Aloud star has ruled out any immediate plans to embark on a solo tour.
She explained: "People have to want me to tour. I'm a realist. I need to wait to see if people care first. If the demand is there, I'd love to tour. But playing live on my own is scary.
"My first solo show was a festival in Newcastle to 10,000 people and I felt so alone on stage. I was aware of all this space behind me where the other girls would usually be, and I thought, 'Wow, this is a whole new ball-game'."
Nicola Roberts's debut album Cinderella Eyes is out now.
> Nicola Roberts 'doesn't make music for commercial reasons'
> Nicola Roberts didn't write personal lyrics to be 'self-indulgent'
Watch the music video for Nicola Roberts's new single 'Lucky Day' below: