The singer-turned-fashion designer – who is expecting her first child with fiancé Eric Johnson – said that she's decided to find out because she wants to be able to plan.
'I'm so excited!' she told Us Weekly. 'We have a couple names picked out for [if it's a boy or a girl], but we're going to keep that private.
'I like to plan things out. It'll be good to know what colours to make the nursery. I'm obsessed with thinking about what it's going to look like.'
Asked about the best part of being a mum-to-be, she added, 'Just knowing that [Eric] and I created something inside of me is so crazy to think about. We love each other so much, and knowing that I love this baby inside of me is so amazing.'