“That album has shaped me in so many ways,” Martin Kay, a 25-year-old fighter from Australia, said. The defiant “Fighter” saw her lean into bombastic arena-rock, while “Keep on Singin’ My Song” was an empowerment anthem that blended elements of gospel and drum and bass. "Sorry I'm not a virgin, sorry I'm not a slut," she sang on an album interlude, refusing to let herself be defined by sexist female archetypes. Co-writing all but two songs, Aguilera blossomed from an uncommonly gifted pop singer into a musically versatile and lyrically candid artist who sang about feminism, sex, and self-worth. Nadal has remained loyal ever since: she has a tattoo of the singer’s face on her forearm, and even gave her daughter the middle name “Christina.” Many other “fighters” were also drawn initially to Aguilera’s four-octave vocal range then became even more invested when she released 2002’s Stripped album. Her voice just gave me a completely different vibe from the typical bubblegum pop princesses.” “I’d never heard anyone sing like that before-it was her vocal ability and range that really got me hooked. "There was an album medley on the CD single which featured “ I Turn to You,” Nadal tells VICE. Jessica Nadal, a 32-year-old super fan from the U.K., fell for Aguilera when she bought “What a Girl Wants,” a soulful bop that became the singer’s second big hit.