A huge pop star has been forced to cancel part of their upcoming tour 'to protect my health'. Demi Lovato stunned her fans with the announcement as she was preparing a number of dates in April. In a message to her 'Lovatics', the Cool For The Summer songstress, 33, revealed her It's Not That Deep Tour wouldn't be going ahead as planned. However, she did reveal she is excited to get back onto the stage at a later date. The tour was initially scheduled to visit 23 cities across North America.