The classically-trained singer said that despite liking to mix it up a little when it comes to her sound, she wouldn't want to stray too far from her roots.
'I think that even though my albums have changed they've always been a collection of different styles, but I think in the last few albums I have incorporated more original pop songs, but I would never make an album just of pop songs,' she told Music Omh.
'For one song it's OK, but my mum always says 'You worked so hard to sing properly, don't stop using that!''
The 31-year-old mezzo-soprano added that she loves nothing more than being asked to sing the national anthem because she is so proud of her heritage.
'I am quite a patriotic person. I'm proud of being Welsh, and proud of being British, so I think when you do get those occasions where you go along and sing the anthem at a sporting event, say, I always really love being invited to those things and love doing those things. I enjoy the sense of occasion.'