She said: "To all our amazing Mixers! Thank you so much for all your lovely messages over the past couple of days.
In a statement, Aiken promotions said: "Tickets for yesterdays Matinee Show will now be valid for the Matinee Show on Saturday 2 July.
"Tickets for the yesterdays Evening Show will now be valid for the Evening Show on Saturday 2 July.
"For anyone not able to attend the rescheduled Shows on Saturday 2 July, please contact point of purchase for detail of how to obtain a refund."
Neil Walker General Manager of The SSE Arena, Belfast added:"Having explored all available options, we can confirm that the cancelled Little Mix matinee and evening concerts from yesterday will go ahead on Saturday 2nd July at The SSE Arena, Belfast.
“Tickets for both performances will be valid on this new date. For anyone unable to attend the rescheduled shows, please contact point of purchase for details on how to obtain a refund.
“Please note, tickets for matinee /evening shows are only valid for that show and are non-transferable.
“We apologise for the inconvenience caused yesterday and hope to welcome Little Mix fans back to the arena on the rescheduled date."
Doors were due to open for their first show on Thursday at 1.30pm and a second show was scheduled for 6.30pm.
The band had played the 3Arena in Dublin on Wednesday night and hours before the band were due to take to the Belfast stage they were retweeting pictures of fans waiting outside the arena and had tweeted asking fans to "get weird".
The statement was released minutes after the doors were due to open with some fans saying they had already been queuing for over an hour.
Heartbroken fans have been sharing their heartache and devastation on social media, many voicing outrage at the last minute nature of the announcement.
Many had travelled a distance to get there with some coming from Galway, Wales and Liverpool.
There were also bus loads who journeyed from Londonderry.
Tara Clelland told the Belfast Telegraph: "I was taking my 10-year-old tonight, she is devasated."
Carolyn McWilliams said: "I am gutted that tonight’s concert has been cancelled as I purchased the tickets for my daughter's 10th birthday which is today.
"We didn’t have a party or anything as she was attending the concert and now we have nothing #oneunhappylittlebirthdaygirl"
Ciara McGeough said: "I was suppose to be taking my 11 year old niece. This is a complete joke how can they go from twitter asking people waiting outside the arena to 'get weird' to canceling the show because 1 of them is sick. Seriously. She got so sick in the space of an hour."