The R'n'B star, who is dating LA Dodgers player Matt Kemp, said that she definitely wants children but has a laid back attitude to the timing.
She told Interview magazine, 'I don't really plan on the age. It could be a year from now. It could be 10 years from now. Whenever is right.
'I mean, I have a lot of other stuff to accomplish before I get to kids. Whenever the time is right, I'll just know.'
The 22-year-old added that she hopes for a boy because she knows how much trouble she was as a youngster.
'If I had a girl, she'd probably be really rebellious,' she said. 'She would be like a bundle of karma.'
And ideally the Umbrella singer would like to raise her family in Barbados, but her career could prevent that.
'I can't live that far away from everything now, without kids,' she explained. 'So I certainly couldn't raise kids and [have a career] with the demanding schedule that I have.'