Popsugar Celebrity Kelly Clarkson Simon Cowell's Hollywood Star Ceremony August 2018 Kelly Clarkson and Many More Stars Support Simon Cowell at His Hollywood Star Ceremony 24 August 2018 by Kelsie Gibson First Published: 23 August 2018 View On One Page Photo 18 of 25 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 18 Adam Lambert and Simon Cowell Pictured: Simon Cowell and Celebrities Previous Next Start Slideshow Kelly ClarksonSimon Cowell