AceShowbiz - On "America's Got Talent" semi-finals, drone act Sky Elements delivered a breathtaking outdoor performance dedicated to member Preston Ward's late infant daughter, Briley Rose. In the Wednesday, September 11 episode, the touching tribute featured giant rose and butterfly formations, leaving judge Simon Cowell speechless. Cowell struggled to find words, saying, "That was, uh, that was, um - oh gosh."

The performance prompted Cowell to grant each judge an additional Golden Buzzer to protect their favorite acts, a move he had not made before in the auditions round. From the other end of the judges' table, Howie Mandel noted that the loving tribute was particularly poignant, airing on September 11.

"I can't thank you enough for this," Mandel told Sky Elements. "I'm looking at your family members. . . . There isn't an act that just moves your heart this much, and you just broke us."

Other judges Sofia Vergara and Heidi Klum were equally affected. "I mean, who knew that drones could make you so emotional?" Vergara asked. "That was a surprise. That was so beautiful! That was, like, heartfelt, and I mean, I don't even know what to say. Congratulations! What a beautiful, beautiful job." Klum added, "I just want to give you a big hug right now."

In addition to Sky Elements, the semi-finals featured impressive performances from aerialist Kelsey Jane, quick-change artist Solange Kardinaly, magician Young Min, singers Alex Sampson, Ashes & Arrows, Pranysqa Mishra, Reid Wilson, dance group Brent Street and comedian Learnmore Jonasi.

The night's six top acts will be revealed on the September 12 results episode. These acts, along with the four who received the Live Show Golden Buzzer, will form the group of 10 finalists who will compete one last time on September 17, with the winner to be announced on the September 24 finale.