She's "bummed," but still superstar Kelly Clarkson is cancelling two tour dates, including Thursday's West Palm Beach appearance at Perfect Vodka Amphitheatre, "due to instruction of several doctors," according to a just-released press statement.

“So bummed that I have to cancel some of my tour dates. This kills me, but doctors are saying I need to rest my voice! I can’t wait to get healthy and see y’all back on the road soon,” Clarkson, who is currently pregnant with her second child, said in the statement, which cancels the West Palm date and an earlier one in Tampa on Tuesday. All tickets are refundable at their point of purchase.