KATIE McCARTNEY

GM /// Monument Records

Under the leadership of McCartney, 36, country singer-songwriter Walker Hayes became a crossover star with his No. 3 Billboard Hot 100 smash, “Fancy Like,” and its follow-up, “AA.” The success of the former song — sparked by Hayes’ DIY TikTok dance video with his daughter going viral — “catapulted Monument to a whole new level,” she says. The song gave the 5-year-old label its first

No. 1 hit (on four Billboard country charts), spawned a national Applebee’s ad campaign and was a social media phenomenon. “It is something our team has been preparing for for years. And it’s unreal to see the magic work.”