Katy Perry, Luke Bryan, Carrie Underwood, and Celine Dion starred in a new ad for Resorts World Las Vegas. The ad suggests that the four musicians may be joining DJs Tiesto and Zedd in booking residencies at the hotel, which opens in June. The surreal commercial features a couple waking up in a fantasy world filled with Vegas-themed animations. Katy is transformed into a mermaid, Luke pranks her by attaching a boot to his fishing hook, Carrie appears as a fairy princess, and Celine stuns in a wine-colored gown. The new hotel is set to open on June 24.