Perhaps the only thing more intimidating than singing one of the coaches' songs onThe Voice, is singing one of their wife's songs!

That's exactly what Bella DeNapoli did during Monday's Top 20 live performances, wowing all four of the coaches -- including Blake Shelton -- with her cover of Gwen Stefani's 2006 hit, "The Sweet Escape."

"I'm dying for Gwen to hear this," Blake raved after the jazzy interpretation of his wife's track. "There's taking a song a making it your own and then there's-- She and Akon are probably gonna have to add you to the copyright."