Katy Perry, Luke Bryan, Celine Dion, Carrie Underwood and more cut ad for new Strip hotel

Carrie Underwood, Tiësto and Katy Perry Lend Their Star Power to New Commercial for Resorts World Las Vegas

Katy Perry Is A Sexy Mermaid In New Vegas Resort Commercial With Celine Dion & Carrie Underwood

Orlando Bloom cradles baby Daisy, seven months, as Katy Perry models 'MAMA' cap