The singer has two children, Ruby, three, and 20-month-old Dexter with her former fiance Gavin Henson, and although she hasn`t found it easy to move on she would like to get pregnant again in the future.
Charlotte - who is dating musician Jonathan Powell - said: "It`s weird to think that they won`t be entirely related to my two children now. I`d also hate to think that Ruby and Dexter are the last time I`m ever pregnant. Because I loved the whole thing. I love it all, I loved being pregnant, breastfeeding, having young children.
"The tiredness and the hard work of it all is tough but it`s amazing. It`s the best thing in the whole world and I think sometimes you hear so much of the negatives but it is ridiculously rewarding."
The 24-year-old star - who relaunched her pop career in 2010 with new album `Back to Scratch` - accepts the responsibilities of parenthood are huge but is adamant her children are the most important thing in her life.
She explained to BANG Showbiz: "They`re amazing and to shape these two little individual people who will eventually be completely separate from you. To bring them up and try to make sure you`re doing the right thing is just amazing."