Mariah Carey, Fergie
Theo Wargo/WireImage; Lionel Hahn / AbacaUSA

What a day for Hollywood birthdays! Mariah Carey turned 42 today, and Fergie blew out 37 candles. Congratulations, ladies! To celebrate, we’re taking a look back at Carey’s transformation from big-haired high schooler to Grammy-winning glamour girl. Click through the gallery to see her most memorable beauty moments!

SEE MARIAH'S TRANSFORMATION

MORE:
Mariah and More New Hollywood Moms
See Fergie’s Transformation, Too!
Fergie Wears Gaultier to the Grammys