Hear'Say auditioned loads of people to be in the band when Kym left, before picking former backing dancer Johnny.
Suzanne says Hear'Say have been working on loads of new stuff, and want to be able to perform that in the concerts as well as hits like Pure and Simple.
Hear'Say's record company is telling people should take their tickets back to where they bought them and get a refund.
The news comes on the same day that the Pop Idol finalists kick off their national tour.