When Kelly Clarkson takes the stage, everyone should know to stop and listen. The original American Idol has been captivating audiences for more than 20 years, and she's proven to be the best in the business.

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.'