Few Pop divas can say they’ve spent as much of their careers fielding comparison to a peer as Britney Spears and Christina Aguilera have.<br /><br />Mostly fueled by purported similarities in their images, early sound, proximity in their respective rises to fame, and on-and-off again rivalry, the chart titans – now both in their 40s – have endured over 20 years of being pitted against each other, a positioning that seems to show no signs of slowing.<br /><br />Case in point? Spears taking to Instagram recently to show off her vocal chops.<br /><br />The glowing newlywed, who has dodged mixed reviews in the past for her vocal showings on the platform, garnered favorable commentary this time when she belted a stunning rendition of her breakthrough 1998 hit ‘Baby One More Time.’<br /><br />Highlighted with growls and soaring melisma, the contralto showcase – which for many was reminiscent of Xtina’s signature style – was the latest of Britney embracing her true singing voice (the opposite of the thinner and more nasally-driven vocal showings that line her biggest hits).<br /><br />Look inside to hear the 40-year-old show you what she’s got “one more time.”<br /><br />
