The singer, whose 'Start Without You' is currently number one on the UK singles chart, insisted that her confidence has grown since winning The X Factor in 2008, and that she plans to experiment with her sound on her next album.
"I’ve never been afraid to take risks and experiment," she told the Daily Star. "Even Simon [Cowell] can’t hold me back.
"A second album should not sound like the first one. I want to better myself and that takes hard work and time.
"My music has always been pop, but my voice is soulful. I want every genre of music in a blender: mix it together, the outcome is me."
Burke recently confirmed that she will release a special edition of her debut Overcome on November 29.