The Apple Music executive doesn't have nearly the same name recognition as the senior executives, from Eddy Cue to Craig Federighi, who shuffled on to the stage at the annual developer conference on Monday.
But Saint John quickly turned heads during her appearance at the event, and not just because she got Apple's audience to rap along to The Sugarhill Gang's "Rapper's Delight." Even if the audience filled with tech developers wouldn't sing aloud as loudly as "Boz" wanted, her enthusiasm was infectious.
Twitter instantly lit up, some people even tweeting that she should be the next CEO. BuzzFeed crowned her "the coolest person to ever go onstage at an Apple event."
To her friends, though, it's not a surprise that the Apple exec would captivate the crowds.
"Boz is a fierce woman in consumer tech and is making waves at Apple," said Anjula Acharia-Bath, a partner at Trinity Ventures and friend of Saint John's, in an interview with Business Insider. "This was her moment to shine."
Saint John ended up at Apple thanks to its acquisition of Beats Music - a move that she hadn't originally seen coming. She joined only three months before Beats was sold to Apple, but has taken the reins as the head of global consumer marketing for Apple Music and iTunes.
Her path to get to the Apple stage wasn't easy. Born to Ghanaian parents, Saint John moved with her family to Colorado Springs, Colorado, when she was 14. Her father's journey from joining the Ghanaian army as a clarinet player to graduating from college in the US continues to be her biggest inspiration to this day, she says.
"People who would have seen him on paper would have said he would never achieve," Saint John said in a keynote at the nonprofit First Graduate this past May.
Saint John also went to Wesleyan University and spent a few years after graduation at the ad agency Spike DDB. Then, Saint John's career took her to Pepsi for nearly a decade, with a quick stint at fashion brand Ashley Stewart.