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.

Kelly Clarkson has postponed the holiday weekend opener of her Las Vegas residency, titled Kelly Clarkson: Studio Sessions, at the Colosseum Theater at Caesars Palace hours before the show was scheduled as a safeguard measure against “serious damage” to her vocal cords.

There has to be some repercussion. Something for the people that spent thousands to get there,” one upset fan wrote via social media.