But there have been loads of reports that her parents don't like her boyfriend. It was even said that Charlotte, 16, had sacked her mum, Maria, as her manager. But they've denied this.
"The reason Charlotte did not fly out to the US was that she was feeling ill and felt that she wasn't well enough to make that long flight to America without her mother beside her," her spokeswoman said.
Charlotte's mum will be looking after her until her tour starts on 3 December, she added.