Mariah Carey is an American singer, songwriter, and actress renowned for her powerful five-octave vocal range and use of the whistle register. Her music blends elements of pop, R&B, hip hop, soul, and gospel, and she has been heralded as one of the defining voices of the 1990s. Carey's most influential works include multi-platinum albums such as "Mariah Carey" (1990), "Music Box" (1993), and "Daydream" (1995), which spawned numerous chart-topping singles. Her 1994 holiday single, "All I Want for Christmas Is You," has become an enduring seasonal classic. Carey's musical style and vocal prowess have significantly influenced a generation of pop and R&B singers.