36 acts took part in the quarterfinals, among them eight other singers, five of them under the age of 18. Kadie Lynn Roberson, and Grace, both 12 were the youngest among the singers. (Source: Wikipedia).
”The 12-year-old stood at the center of a jazzed-up stage, complete with fog and a twinkling pink tree, but she didn’t need an ounce of those accoutrements the moment she began strumming her ukulele and singing an original tune called “Beautiful Thing” (Breanne L. Heldman for Entertainment Weekly, August 24, 2016)
”The 12-year-old wunderkind ukulele player with the soulful voice brought the house down during her AGT live performance Tuesday … Grace's original song, Beautiful Thing, written for her sister, was a thing of perfectly imperfect beauty that ended the two-hour program” (Bryan Alexander for USA Today, August 24, 2016)
”The tiny 12-year-old stood centerstage under a twinkling tree with only a ukulele and gave a heartfelt delivery of a song called "Beautiful Thing," which she wrote for her older sister, leaving the audience and judges stunned with her raw talent. VanderWaal's vocals, which sounded at least twice her age, were nearly flawless and dripping with character as she wove the story, sharing with the crowd the special relationship she and her sibling have. The upbeat, folky tune is a tribute to their bond that just got better as it went on, showing off both her ability to infuse nuance into her vocals and her skill with the bigger notes.” (Laura Mcclellan for Taste of Country, August 25, 2016)