Mariah Carey is very famous for her Christmas music as well as her pop and R&B tracks from the 90s and 00s. If you are a fan of Mariah Carey, the legendary singer and songwriter who has sold over 200 million records worldwide, you might want to try Mariah Carey Heardle, a musical game that tests your knowledge of her songs. Mariah Carey Heardle is one of the latest spinoffs of Heardle, the viral music-guessing game that has captivated millions of people. But instead of guessing a word, you have to guess a song by Mariah Carey from a short audio clip.