Kelly Clarkson's highly anticipated Las Vegas residency opening was postponed hours before showtime because the singer needs vocal rest after demanding preparations.

The pop star postponed performances at Caesars Palace with just 90 minutes notice, citing the need to rest her voice after intensive rehearsals.

Kelly Clarkson said rehearsals for her new Las Vegas residency have "taken a toll on my voice" so she postponed the July 4 opening of the show to avoid "doing serious damage." She told fans, "I am taking this weekend and next week to rest up so that we can deliver what you all deserve.