Kelly Clarkson kicked off her Las Vegas residency's first show with an apology to fans after postponing opening night last week: 'I'm so sorry. We can't help our bodies sometimes.'

Kelly Clarkson kicked off her latest Las Vegas residency on Friday, July 11 — one week after she was forced to cancel two shows hours before the first was scheduled to begin to 'protect' her voice.

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.