Jennifer Lopez hits a birthday milestone today by turning 45! The actress-turned-singer looks as youthful as ever (see the vintage snapshot above for proof!). It’s been more than 15 years since the American Idol judge first entered the spotlight with her title role in Selena, the film that ultimately catapulted the Bronx native’s acting and singing career.

For years, we’ve stood by Lopez and watched her career flourish into a multi-platform business, which boasts a slew of movies, albums, and clothing lines. Not only has InStyle’s April cover girl regularly ruled the red carpet circuit with her curve-hugging outfits, but is also conquering the airwaves with her latest super-catchy album, A.K.A. There’s no stopping the muy caliente mother of two, who remains gorgeous—with or without makeup—and is the proud owner of a rockin’ body (have you seen her washboard abs?).

Go back in time and relive Jennifer Lopez’s best beauty moments, starting with this gem from her high school days.