Published Monday, 14 April 2014
The pop star announced the happy news on Twitter, writing: "Yes I am having a new lovely baby children are such a blessing and I'm grateful to god for my new little gift."
Ferguson is already a mother of two children, Lillie May and Karl, from a previous relationship. The father of her unborn baby is not known, but the star has revealed in recent interviews that she is dating a man she has known for several years.
The announcement comes two months after Ferguson appeared to faint on daytime show Loose Women after performing her track All That I've Got.
Ferguson previously dated One Direction star Zayn Malik after they both found fame on The X Factor in 2010.