"We can't help our bodies sometimes," said the singer, who'd previously explained that she needed to "protect" her voice when she canceled her first show.

From tequila shots to the stories behind her biggest hits, here are the top moments from night one of the pop superstar's residency on July 11.

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