LI's Bella DeNapoli advances to live finals on 'The Voice'

West Islip's Bella DeNapoli won her Knockout Round sing-off against Katherine Ann Mohler Monday night on NBC's "The Voice," sending the 22-year-old contestant to the show's live finals.

"Bella, it was a beautiful, stunning vocal today," the two women's coach, pop star Ariana Grande, told her on air after DeNapoli performed Sia's sad and self-deprecating "Chandelier" against Mohler's downtempo rendition of Bell Biv DeVoe's originally upbeat and driving "Poison."

"I had to go with Bella," Grande explained in voice-over. "Her Knockout was really gorgeous vocally but also so emotionally vulnerable and moving."

Coach John Legend said he admired DeNapoli's "really cool rendition of 'Chandelier.' And when you're in your quiet part of your voice, you do, like, these little, tight runs and it's really compelling." Coach Kelly Clarkson called DeNapoli's voice "this pretty, angelic thing, but you've got a little edge to it."

"[M]y beautiful @belladenapoli singing her moving arrangement of 'chandelier' #teamariana i love this human," Grande wrote on Instagram Stories, where posts cycle out after 24 hours.

"[T]his performance was just one of those moments," DeNapoli wrote on Instagram. The daughter of local singer Nanci-jean DeNapoli and guitarist Tom DeNapoli, who also own and run the Deer Park electrical contracting firm KND, she added in an aside to singer Sia, "Thank you for blessing us all with your powerful message."

She additionally wrote that upon learning Mohler "was my knockout partner … instant tears poured out of my eyeballs!!!!!!! to my talented, beautiful and brilliant friend … i love you and i am honored to share the stage with you. proud of you always."

Addressing Grande, Bella DeNapoli said, "I don't think words will ever be able to describe the love i have for you as a human being as well as a coach. having you as a mentor thus far has changed me for a life time [sic]. you inspire me to keep challenging myself as an artist and i can not [sic] wait to continue on this journey together!!"

The live finals start Nov. 8 at 8 p.m.