The 34-year-old singer posted on Twitter that she is pregnant with her second child and also revealed the gender of the child, reported Daily Mirror.
"Thank you for all your kind words. Yes, me and Hugh Hanley are expecting a little boy. After everything that's happened we are so so lucky," she said.
Heaton had a double mastectomy in 2012 after learning she have 85 per cent chances of developing breast cancer.
'Just a Little' hitmaker called her second pregnancy a miracle.
"It's a miracle, I've had three scans. I've seen the heartbeat twice," she said.