The girls said they are really disappointed that they won't be going on tour.
"Sarah, Nadine, Kimberley, Nicola and Cheryl were looking forward to performing in front of the fans that had made them number one for three weeks," a statement from their record label said.
"Girls Aloud hope to stage their own tour soon."
'Boys not looking good'
Their managers admitted the 12 dates had been cancelled because of lack of interest.
But Girls Aloud manager, Louis Walsh, insisted it was the boys' fault, and that the girls would be touring on their own later in the year.