Former X Factor finalist Stacey has been in a relationship with Aaron since 2009 and they got engaged in 2011.
Soon after their engagement, the couple announced that they were expecting their first child together - a son called Leighton, who was born in May the following year.
In a statement, Stacey's rep today said: 'It's with regret that I can confirm that Stacey's relationship with Aaron has unfortunately come to an end.
"Her priority is her two children. She thanks her fans for their support at this time." Neither Stacey or Aaron have spoken about their split on Twitter.
In November, Stacey told Reveal that she and Aaron were struggling to find time to plan their wedding and said it was "last on her list".
Stacey, 24, said: "It's always the last thing on my list and that sounds really bad but it's only because I feel like there's so many other things that come first, like the kids and work.
"It always gets pushed to the back.
"I think what will happen is that me and Aaron will just flee somewhere one day and go 'lets get married!' Trying to plan something is impossible, just absolutely impossible."
Stacey is also mum to six-year-old Zachary from a previous relationship.
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