Celebrity Transformations See Mariah Carey's Changing Looks Through the Years in Honor of Her Birthday By Grace Gavilanes Grace Gavilanes Grace Gavilanes is a NYC-based writer and editor who joined InStyle in 2013. She covers all things entertainment, celebrity, and movies. InStyle's editorial guidelines Published on March 27, 2015 @ 08:01AM Pin Share Tweet Email Photo: Getty Images Happy birthday, Mariah Carey! The Grammy winner, who turns 45 today, has left us speechless with her catchy singles and unforgettable performances through the years. Since her start on the music scene and subsequent dive into film, the songstress, who previously won an InStyle Social Media Award, has also stunned on the red carpet with her form-fitting gowns and ultra glam hair and makeup looks. From her high school days as a devoted hairspray enthusiast to her red carpet curls, click through our gallery to see Carey's standout beauty looks. PHOTOS: Mariah Carey's Transformation