The shows scheduled for 4 and 5 July were cancelled due to the strain rehearsals had placed on her voice, with the singer needing to rest to prevent serious damage.
Clarkson shared an emotional statement on Instagram, expressing her devastation at having to postpone and her desire for the shows to be perfect for her fans.
Caesars Palace confirmed the postponements, advising ticketholders they could receive refunds or keep their tickets for rescheduled performances.
Fans reacted with mixed emotions, with some expressing disappointment over the late notice and financial impact, while others wished her a speedy recovery.