Kelly Clarkson's Vegas Residency: Her Setlist, What She Wore and What It Was Like originally appeared on Parade. What doesn't kill you makes you stronger. That's what Kelly Clarkson belts out in her hit "Stronger," and boy does she mean it.

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.'

The American Idol champ will do a rotating Kellyoke cover every night, and she chose a Dolly Parton-written Whitney Houston classic for her debut.