You and Idol Precure♪ Movie

One day, Uta and her friends find themselves invited to perform at the "Super Miracle Idol Festival," the universe's greatest idol festival held on the mysterious Aiai Island, by the coral fairy Tot. Suddenly, a mysterious monster appears, plunging the island and the world into a major crisis, and Uta and her friends are sent flying back in time. The key to overcoming this crisis lay hidden with the island's legendary goddess and with Tera, a mysterious idol-hating girl they meet on the island. Last but not least, the Hirogaru Sky! Precure and the Wonderful Precure also make their appearance! As they sing, dance and deliver fan-service, a kirakilala live for YOU begins! (Source: Official Website, translated)