The opera singer and her husband Andrew Levitas are set to expand their family in 2018 with a new arrival.
Katherine, who is already a mum to two year old daughter Aaliyah Reign, announced the happy news to her 66k followers.
Sharing an adorable picture of her daughter wearing a cape, the opera singer revealed there was a "side kick coming soon".
Also announcing the sex of the baby, Katherine wrote: "Andrew and I are overjoyed that our family will be growing in 2018 with the addition of our second child - a baby brother for our little superhero Aaliyah!!!"
More to follow.
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